# Names to numbers

*is a*

**Names to numbers****draft**programming task. It is not yet considered ready to be promoted as a complete task, for reasons that should be found in its talk page.

Translate the spelled-out English name of a number to a number. You can use a preexisting implementation or roll your own, but you should support inputs up to at least one million (or the maximum value of your language's default bounded integer type, if that's less).

Support for inputs other than positive integers (like zero, negative integers, fractions and floating-point numbers) is optional.

- See also

- Number names — the reverse operation.

## 11l

```
V Names = [‘one’ = Int64(1),
‘two’ = 2,
‘three’ = 3,
‘four’ = 4,
‘five’ = 5,
‘six’ = 6,
‘seven’ = 7,
‘eight’ = 8,
‘nine’ = 9,
‘ten’ = 10,
‘eleven’ = 11,
‘twelve’ = 12,
‘thirteen’ = 13,
‘fourteen’ = 14,
‘fifteen’ = 15,
‘sixteen’ = 16,
‘seventeen’ = 17,
‘eighteen’ = 18,
‘nineteen’ = 19,
‘twenty’ = 20,
‘thirty’ = 30,
‘forty’ = 40,
‘fifty’ = 50,
‘sixty’ = 60,
‘seventy’ = 70,
‘eighty’ = 80,
‘ninety’ = 90,
‘hundred’ = 100,
‘thousand’ = 1000,
‘million’ = 1000000,
‘billion’ = 1000000000,
‘trillion’ = 1000000000000,
‘quadrillion’ = 1000000000000000,
‘quintillion’ = 1000000000000000000]
V Zeros = [‘zero’, ‘nought’, ‘nil’, ‘none’, ‘nothing’]
F nameToNum(name)
V text = name.lowercase()
V isNegative = text.starts_with(‘minus ’)
I isNegative
text = text[6..]
I text.starts_with(‘a’)
text = ‘one’text[1..]
V words = text.split(re:‘,|-| and | ’).filter(w -> !w.empty)
I words.len == 1 & words[0] C Zeros
R Int64(0)
V multiplier = Int64(1)
V sum = Int64(0)
L(i) (words.len - 1 .< -1).step(-1)
V num = Names.get(words[i], 0)
I num >= 1000
multiplier = num
I i == 0
sum += multiplier
E I num >= 100
multiplier *= 100
I i == 0
sum += multiplier
E
sum += num * multiplier
R I isNegative {-sum} E sum
V names = [
‘none’,
‘one’,
‘twenty-five’,
‘minus one hundred and seventeen’,
‘hundred and fifty-six’,
‘minus two thousand two’,
‘nine thousand, seven hundred, one’,
‘minus six hundred and twenty six thousand, eight hundred and fourteen’,
‘four million, seven hundred thousand, three hundred and eighty-six’,
‘fifty-one billion, two hundred and fifty-two million, seventeen thousand, one hundred eighty-four’,
‘two hundred and one billion, twenty-one million, two thousand and one’,
‘minus three hundred trillion, nine million, four hundred and one thousand and thirty-one’,
‘seventeen quadrillion, one hundred thirty-seven’,
‘a quintillion, eight trillion and five’,
‘minus nine quintillion, two hundred and twenty-three quadrillion, three hundred and seventy-two trillion, thirty-six billion, eight hundred and fifty-four million, seven hundred and seventy-five thousand, eight hundred and eight’]
L(name) names
print(‘#20’.format(nameToNum(name))‘ = ’name)
```

- Output:

0 = none 1 = one 25 = twenty-five -117 = minus one hundred and seventeen 156 = hundred and fifty-six -2002 = minus two thousand two 9701 = nine thousand, seven hundred, one -626814 = minus six hundred and twenty six thousand, eight hundred and fourteen 4700386 = four million, seven hundred thousand, three hundred and eighty-six 51252017184 = fifty-one billion, two hundred and fifty-two million, seventeen thousand, one hundred eighty-four 201021002001 = two hundred and one billion, twenty-one million, two thousand and one -300000009401031 = minus three hundred trillion, nine million, four hundred and one thousand and thirty-one 17000000000000137 = seventeen quadrillion, one hundred thirty-seven 1000008000000000005 = a quintillion, eight trillion and five -9223372036854775808 = minus nine quintillion, two hundred and twenty-three quadrillion, three hundred and seventy-two trillion, thirty-six billion, eight hundred and fifty-four million, seven hundred and seventy-five thousand, eight hundred and eight

## Common Lisp

A counterpart to (format t "~R" ...).

```
(defpackage number-names
(:use cl))
(in-package number-names)
(defparameter *ones*
'((one . 1)
(two . 2)
(three . 3)
(four . 4)
(five . 5)
(six . 6)
(seven . 7)
(eight . 8)
(nine . 9)))
(defparameter *teens*
'((ten . 10)
(eleven . 11)
(twelve . 12)
(thirteen . 13)
(fourteen . 14)
(fifteen . 15)
(sixteen . 16)
(seventeen . 17)
(eighteen . 18)
(nineteen . 19)))
(defparameter *tens*
'((twenty . 20)
(thirty . 30)
(forty . 40)
(fifty . 50)
(sixty . 60)
(seventy . 70)
(eighty . 80)
(ninety . 90)))
(defparameter *hundred*
'((hundred . 100)))
(defparameter *illions*
'((quintillion . 1000000000000000000)
(quadrillion . 1000000000000000)
(trillion . 1000000000000)
(billion . 1000000000)
(million . 1000000)
(thousand . 1000)))
(defparameter *delims* '(#\Space #\Tab #\Newline #\-))
;; Turn a single delimited word into an atom.
(defun tokenize-word (word)
(let ((stream (make-string-output-stream)))
(loop do
(let ((char (pop word)))
(cond ((null char) (return))
((member char *delims*) (return))
(t (write-char char stream)))))
(let ((out (get-output-stream-string stream)))
(values (intern (string-upcase out) 'number-names)
word))))
;; Tokenize the input string.
(defun tokenize (word)
(let ((word (coerce word 'list))
(tokens (list)))
(loop do
(let ((char (pop word)))
(cond ((null char) (return))
((member char *delims*) nil)
(t (multiple-value-bind (token rest-word)
(tokenize-word (push char word))
(setf word rest-word)
(push token tokens))))))
(reverse tokens)))
;; Define a state machine to parse a subsection of a number
;; that precedes an -illion.
(defmacro defstate (name end-transitions-p &rest transitions)
(let ((token (gensym "TOKEN"))
(number (gensym "NUMBER"))
(illions (gensym "ILLIONS"))
(illion (gensym "ILLION")))
`(defun ,name (,token ,number ,illions)
,(append '(cond)
(loop for trans in transitions collect
(destructuring-bind (place to-state op) trans
`((assoc ,token ,place)
(values ',to-state
(,op ,number (cdr (assoc ,token ,place)))))))
(when end-transitions-p
`(((assoc ,token ,illions)
(throw 'done
(let ((,illion (assoc ,token ,illions)))
(values (* ,number (cdr ,illion)) (car ,illion)))))
((null ,token) (throw 'done (values ,number nil)))))
`((t (error "Unexpected token ~a" ,token)))))))
(defstate state-a nil
(*ones* state-b +)
(*tens* state-d +)
(*teens* state-e +))
(defstate state-b t
(*hundred* state-c *))
(defstate state-c t
(*ones* state-e +)
(*tens* state-d +)
(*teens* state-e +))
(defstate state-d t
(*ones* state-e +))
(defstate state-e t)
(defun consume-illions (illion illions)
(cond ((null illions) nil)
((eq illion (caar illions)) (cdr illions))
(t (consume-illions illion (cdr illions)))))
;; Parse a number up to the next -illion.
;; Errors on numbers that (format t "~R" ..)
;; would not generate, like "one thousand one million".
(defun parse-sub-number (tokens illions)
(let ((number 0)
(state 'state-a))
(multiple-value-bind (number illion)
(catch 'done
(loop do
(let ((token (pop tokens)))
(multiple-value-bind (next-state next-number)
(funcall state token number illions)
(setf state next-state)
(setf number next-number)))))
(values number
(if illion
(consume-illions illion illions)
illions)
tokens))))
;; Parse the list of tokenized number parts.
(defun parse-number (tokens)
(let ((illions *illions*)
(total 0)
(negative-p (eq (car tokens) 'negative)))
(when negative-p (pop tokens))
(if (eq (car tokens) 'zero)
(if (null (cdr tokens))
0
(error "Unexpected token ~a" (cadr tokens)))
(loop do
(multiple-value-bind (number new-illions rest-tokens)
(parse-sub-number tokens illions)
(setf illions new-illions)
(incf total number)
(setf tokens rest-tokens)
(unless tokens (return (* (if negative-p -1 1) total))))))))
(defun parse (word)
(parse-number (tokenize word)))
(defun test ()
(let ((test-numbers
'(+0
-3
+5
-7
+11
-13
+17
-19
+23
-29
201021002001
-20102100201
2010210020
-201021002
20102100
-2010210
201021
-20103
2010
-201
20
-2
0)))
(princ "number => (format t \"~R\" number) => (parse (format t \"~R\" number))")
(terpri)
(mapc (lambda (number)
(let ((word (format nil "~R" number)))
(format t "~a => ~a => ~a~%" number word (parse word))))
test-numbers))
(values))
```

Running the test procedure:

```
CL-USER> (number-names::test)
number => (format t "~R" number) => (parse (format t "~R" number))
0 => zero => 0
-3 => negative three => -3
5 => five => 5
-7 => negative seven => -7
11 => eleven => 11
-13 => negative thirteen => -13
17 => seventeen => 17
-19 => negative nineteen => -19
23 => twenty-three => 23
-29 => negative twenty-nine => -29
201021002001 => two hundred one billion twenty-one million two thousand one => 201021002001
-20102100201 => negative twenty billion one hundred two million one hundred thousand two hundred one => -20102100201
2010210020 => two billion ten million two hundred ten thousand twenty => 2010210020
-201021002 => negative two hundred one million twenty-one thousand two => -201021002
20102100 => twenty million one hundred two thousand one hundred => 20102100
-2010210 => negative two million ten thousand two hundred ten => -2010210
201021 => two hundred one thousand twenty-one => 201021
-20103 => negative twenty thousand one hundred three => -20103
2010 => two thousand ten => 2010
-201 => negative two hundred one => -201
20 => twenty => 20
-2 => negative two => -2
0 => zero => 0
; No value
```

## D

This uses the D module from the Number names task.

```
import std.stdio, std.array, std.string, std.algorithm, std.bigint,
std.range, number_names;
BigInt bigIntFromWords(in string num)
in {
assert(!num.empty);
} body {
auto words = num.replace(",", "").replace(" and ", " ")
.replace("-", " ").split;
immutable sign = (words[0] == "minus") ? -1 : +1;
if (sign == -1)
words = words[1 .. $];
BigInt bsmall, total;
foreach (const word; words) {
if (small.canFind(word)) {
bsmall += small.countUntil(word);
} else if (tens.canFind(word)) {
bsmall += tens.countUntil(word) * 10;
} else if (word == "hundred") {
bsmall *= 100;
} else if (word == "thousand") {
total += bsmall * 1000;
bsmall = 0;
} else if (huge.canFind(word)) {
total += bsmall * BigInt(1000) ^^ huge.countUntil(word);
bsmall = 0;
} else {
immutable msg = format("Don't understand %s part of %s",
word, num);
throw new Exception(msg);
}
}
return sign * (total + bsmall);
}
void main() {
foreach (immutable n; iota(-10000, 10000, 17))
assert(n == n.BigInt.spellBigInt.bigIntFromWords);
foreach (immutable p; 0 .. 20) {
auto n = 13.BigInt ^^ p;
assert(n == n.spellBigInt.bigIntFromWords);
}
writeln("This shows <==> for a successful round trip, " ~
" <??> otherwise:");
foreach (immutable n; [0, -3, 5, -7, 11, -13, 17, -19, 23, -29]) {
const txt = n.BigInt.spellBigInt;
auto num = txt.bigIntFromWords;
writefln("%+4d <%s> %s", n, (n == num) ? "==" : "??", txt);
}
writeln;
long n = 201_021_002_001;
while (n) {
const txt = n.BigInt.spellBigInt;
auto num = txt.bigIntFromWords;
writefln("%12d <%s> %s", n, (n == num) ? "==" : "??", txt);
n /= -10;
}
const txt = n.BigInt.spellBigInt;
auto num = txt.bigIntFromWords;
writefln("%12d <%s> %s", n, (n == num) ? "==" : "??", txt);
}
```

- Output:

This shows <==> for a successful round trip, <??> otherwise: +0 <==> zero -3 <==> minus three +5 <==> five -7 <==> minus seven +11 <==> eleven -13 <==> minus thirteen +17 <==> seventeen -19 <==> minus nineteen +23 <==> twenty-three -29 <==> minus twenty-nine 201021002001 <==> two hundred and one billion, twenty-one million, two thousand, and one -20102100200 <==> minus twenty billion, one hundred and two million, one hundred thousand, and two hundred 2010210020 <==> two billion, ten million, two hundred and ten thousand, and twenty -201021002 <==> minus two hundred and one million, twenty-one thousand, and two 20102100 <==> twenty million, one hundred and two thousand, and one hundred -2010210 <==> minus two million, ten thousand, two hundred and ten 201021 <==> two hundred and one thousand, and twenty-one -20102 <==> minus twenty thousand, one hundred and two 2010 <==> two thousand, and ten -201 <==> minus two hundred and one 20 <==> twenty -2 <==> minus two 0 <==> zero

## Delphi

```
program Names_to_numbers;
{$APPTYPE CONSOLE}
uses
System.SysUtils,
System.Generics.Collections,
System.Math;
function CreateMap: TDictionary<string, Int64>;
const
smallies: array[1..19] of string = ('one', 'two', 'three', 'four', 'five',
'six', 'seven', 'eight', 'nine', 'ten', 'eleven', 'twelve', 'thirteen',
'fourteen', 'fifteen', 'sixteen', 'seventeen', 'eighteen', 'nineteen');
tens: array[2..9] of string = ('twenty', 'thirty', 'forty', 'fifty', 'sixty',
'seventy', 'eighty', 'ninety');
maxies: array[1..6] of string = ('thousand', 'million', 'billion', 'trillion',
'quadrillion', 'quintillion');
var
i: Integer;
begin
Result := TDictionary<string, Int64>.Create();
for i := 1 to 19 do
Result.Add(smallies[i], i);
for i := 2 to 9 do
Result.Add(tens[i], i * 10);
for i := 1 to 6 do
Result.Add(maxies[i], Trunc(IntPower(10, i * 3)));
Result.Add('hundred', 100);
end;
const
zeros = '"zero","nought","nil","none","nothing"';
MIN_INT64 = -9223372036854775808;
var
Names: TDictionary<string, Int64>;
function nameToNum(name: string): Int64;
var
Text, w: string;
IsNegative: Boolean;
words: TArray<string>;
size: integer;
multiplier, lastNum, sum, num: Int64;
i: Integer;
begin
Text := name.trim().ToLower();
IsNegative := Text.startsWith('minus ');
if (IsNegative) then
Text := Text.Substring(6);
if (Text.startsWith('a ')) then
Text := 'one' + Text.Substring(1);
words := Text.split([',', '-', ' and ', ' ']);
size := Length(words);
if ((size = 1) and (zeros.indexOf(words[0].QuotedString('"')) > -1)) then
exit(0);
multiplier := 1;
lastNum := 0;
sum := 0;
for i := size - 1 downto 0 do
begin
w := words[i];
if w.Trim.IsEmpty then
Continue;
if not Names.ContainsKey(w) then
raise EArgumentException.Create(w + ' is not a valid number');
num := Names[w];
if (num = lastNum) then
raise EArgumentException.Create(name + ' is not a well formed numeric string')
else if (num >= 1000) then
begin
if (lastNum >= 100) then
raise EArgumentException.Create(name + ' is not a well formed numeric string');
multiplier := num;
if (i = 0) then
sum := sum + multiplier;
end
else if (num >= 100) then
begin
multiplier := multiplier * 100;
if (i = 0) then
sum := sum + multiplier
end
else if (num >= 20) then
begin
if (lastNum >= 10) and (lastNum <= 90) then
raise EArgumentException.Create(name + ' is not a well formed numeric string');
sum := sum + num * multiplier;
end
else
begin
if (lastNum >= 1) and (lastNum <= 90) then
raise EArgumentException.Create(name + ' is not a well formed numeric string');
sum := sum + num * multiplier;
end;
lastNum := num;
end;
if (IsNegative and (sum = -sum)) then
exit(MIN_INT64)
else if (sum < 0) then
raise EArgumentException.Create(name + ' is outside the range of a Long integer');
if (IsNegative) then
Result := -sum
else
result := sum;
end;
const
TestCases: array[0..14] of string = ('none', 'one', 'twenty-five',
'minus one hundred and seventeen', 'hundred and fifty-six',
'minus two thousand two', 'nine thousand, seven hundred, one',
'minus six hundred and twenty six thousand, eight hundred and fourteen',
'four million, seven hundred thousand, three hundred and eighty-six',
'fifty-one billion, two hundred and fifty-two million, seventeen thousand, one hundred eighty-four',
'two hundred and one billion, twenty-one million, two thousand and one',
'minus three hundred trillion, nine million, four hundred and one thousand and thirty-one',
'seventeen quadrillion, one hundred thirty-seven',
'a quintillion, eight trillion and five',
'minus nine quintillion, two hundred and twenty-three quadrillion, three hundred and seventy-two trillion, thirty-six billion, eight hundred and fifty-four million, seven hundred and seventy-five thousand, eight hundred and eight');
var
name: string;
begin
Names := CreateMap;
for name in TestCases do
Writeln(nameToNum(name): 20, ' = ', name);
Names.free;
Readln;
end.
```

- Output:

0 = none 1 = one 25 = twenty-five -117 = minus one hundred and seventeen 156 = hundred and fifty-six -2002 = minus two thousand two 9701 = nine thousand, seven hundred, one -626814 = minus six hundred and twenty six thousand, eight hundred and fourteen 4700386 = four million, seven hundred thousand, three hundred and eighty-six 51252017184 = fifty-one billion, two hundred and fifty-two million, seventeen thousand, one hundred eighty-four 201021002001 = two hundred and one billion, twenty-one million, two thousand and one -300000009401031 = minus three hundred trillion, nine million, four hundred and one thousand and thirty-one 17000000000000137 = seventeen quadrillion, one hundred thirty-seven 1000008000000000005 = a quintillion, eight trillion and five -9223372036854775808 = minus nine quintillion, two hundred and twenty-three quadrillion, three hundred and seventy-two trillion, thirty-six billion, eight hundred and fifty-four million, seven hundred and seventy-five thousand, eight hundred and eight

## Factor

This solution parses number names in the same format that Factor's existing `number>text`

word outputs. Meaning that for numbers under 10^66, `number>text`

and `text>number`

ought to be inverses of each other.

```
USING: arrays formatting grouping kernel math math.functions
math.parser multiline peg peg.ebnf sequences sequences.deep ;
! Make sure a number is monotonically decreasing.
! So "one hundred and three" is valid but
! "three and one hundred" is not.
: check-natural ( seq -- )
[ > ] monotonic? [ "Invalid number." throw ] unless ;
! Parse number names with Factor's EBNF-like DSL.
EBNF: text>number [=[
one = "one"~ => [[ 1 ]]
two = "two"~ => [[ 2 ]]
three = "three"~ => [[ 3 ]]
four = "four"~ => [[ 4 ]]
five = "five"~ => [[ 5 ]]
six = "six"~ => [[ 6 ]]
seven = "seven"~ => [[ 7 ]]
eight = "eight"~ => [[ 8 ]]
nine = "nine"~ => [[ 9 ]]
ten = "ten"~ => [[ 10 ]]
eleven = "eleven"~ => [[ 11 ]]
twelve = "twelve"~ => [[ 12 ]]
thirteen = "thirteen"~ => [[ 13 ]]
fourteen = "fourteen"~ => [[ 14 ]]
fifteen = "fifteen"~ => [[ 15 ]]
sixteen = "sixteen"~ => [[ 16 ]]
seventeen = "seventeen"~ => [[ 17 ]]
eighteen = "eighteen"~ => [[ 18 ]]
nineteen = "nineteen"~ => [[ 19 ]]
twenty = "twenty"~ => [[ 20 ]]
thirty = "thirty"~ => [[ 30 ]]
forty = "forty"~ => [[ 40 ]]
fifty = "fifty"~ => [[ 50 ]]
sixty = "sixty"~ => [[ 60 ]]
seventy = "seventy"~ => [[ 70 ]]
eighty = "eighty"~ => [[ 80 ]]
ninety = "ninety"~ => [[ 90 ]]
hundred = "hundred"~ => [[ 100 ]]
thousand = "thousand"~ => [[ 1000 ]]
million = "million"~ => [[ 6 10^ ]]
billion = "billion"~ => [[ 9 10^ ]]
trillion = "trillion"~ => [[ 12 10^ ]]
quadrillion = "quadrillion"~ => [[ 15 10^ ]]
quintillion = "quintillion"~ => [[ 18 10^ ]]
sextillion = "sextillion"~ => [[ 21 10^ ]]
septillion = "septillion"~ => [[ 24 10^ ]]
octillion = "octillion"~ => [[ 27 10^ ]]
nonillion = "nonillion"~ => [[ 30 10^ ]]
decillion = "decillion"~ => [[ 33 10^ ]]
undecillion = "undecillion"~ => [[ 36 10^ ]]
duodecillion = "duodecillion"~ => [[ 39 10^ ]]
tredecillion = "tredecillion"~ => [[ 42 10^ ]]
quattuordecillion = "quattuordecillion"~ => [[ 45 10^ ]]
quindecillion = "quindecillion"~ => [[ 48 10^ ]]
sexdecillion = "sexdecillion"~ => [[ 51 10^ ]]
septendecillion = "septendecillion"~ => [[ 54 10^ ]]
octodecillion = "octodecillion"~ => [[ 57 10^ ]]
novemdecillion = "novemdecillion"~ => [[ 60 10^ ]]
vigintillion = "vigintillion"~ => [[ 63 10^ ]]
name = vigintillion|novemdecillion|octodecillion|
septendecillion|sexdecillion|quindecillion|
quattuordecillion|tredecillion|duodecillion|
undecillion|decillion|nonillion|octillion|
septillion|sextillion|quintillion|quadrillion|
trillion|billion|million|thousand|hundred|ninety|
eighty|seventy|sixty|fifty|forty|thirty|twenty|
nineteen|eighteen|seventeen|sixteen|fifteen|
fourteen|thirteen|twelve|eleven|ten|nine|eight|
seven|six|five|four|three|two|one
ws = [\n\t\r ]* => [[ drop ignore ]]
dual = name "-"~ name => [[ sum ]]
atom = dual|name
atoms = (ws atom ws)+ => [[ product ]]
compound = atoms "and"~ ws atom ws name ws
=> [[ first3 swap over [ * ] 2bi@ 2array ]]
simple = atoms "and"~ ws atom ws
basic = "and"~ ws atom ws
group = compound|simple|basic|atoms
natural = (group (","~)? )+
=> [[ flatten dup check-natural sum ]]
negative = "negative"~ ws natural => [[ -1 * ]]
zero = "zero"~ => [[ 0 ]]
integer = zero|negative|natural
fraction = integer "divided by"~ natural => [[ first2 / ]]
digit = nine|eight|seven|six|five|four|three|two|one|zero
mantissa = (ws digit ws)+
=> [[ [ number>string ] map concat ]]
decimal = integer ws "point"~ mantissa
=> [[ first2 [ number>string ] dip "." glue string>number ]]
number = fraction|decimal|integer
]=]
: names-to-numbers-demo ( -- )
{
"zero"
"one"
"negative one"
"nine"
"ten"
"negative seventeen"
"twenty-seven"
"one hundred"
"one hundred and one"
"negative one hundred and nineteen"
"four hundred and ninety-five thousand, three hundred and thirty-three"
"two hundred million"
"two hundred million and twenty-two"
"two hundred million, two thousand and two"
"one trillion, one billion, one million, one thousand and one"
"four hundred and fifty-three vigintillion"
"zero point one"
"one point one"
"negative one thousand, three hundred point zero zero five six seven"
"thirty-seven divided by ninety-one"
"zero divided by two nonillion"
"negative one divided by two nonillion"
}
[ dup text>number "%s => %u\n" printf ] each ;
names-to-numbers-demo
```

- Output:

zero => 0 one => 1 negative one => -1 nine => 9 ten => 10 negative seventeen => -17 twenty-seven => 27 one hundred => 100 one hundred and one => 101 negative one hundred and nineteen => -119 four hundred and ninety-five thousand, three hundred and thirty-three => 495333 two hundred million => 200000000 two hundred million and twenty-two => 200000022 two hundred million, two thousand and two => 200002002 one trillion, one billion, one million, one thousand and one => 1001001001001 four hundred and fifty-three vigintillion => 453000000000000000000000000000000000000000000000000000000000000000 zero point one => 0.1 one point one => 1.1 negative one thousand, three hundred point zero zero five six seven => -1300.00567 thirty-seven divided by ninety-one => 37/91 zero divided by two nonillion => 0 negative one divided by two nonillion => -1/2000000000000000000000000000000

## Go

```
package main
import (
"fmt"
"math"
"regexp"
"strings"
)
var names = map[string]int64{
"one": 1,
"two": 2,
"three": 3,
"four": 4,
"five": 5,
"six": 6,
"seven": 7,
"eight": 8,
"nine": 9,
"ten": 10,
"eleven": 11,
"twelve": 12,
"thirteen": 13,
"fourteen": 14,
"fifteen": 15,
"sixteen": 16,
"seventeen": 17,
"eighteen": 18,
"nineteen": 19,
"twenty": 20,
"thirty": 30,
"forty": 40,
"fifty": 50,
"sixty": 60,
"seventy": 70,
"eighty": 80,
"ninety": 90,
"hundred": 100,
"thousand": 1000,
"million": 1000000,
"billion": 1000000000,
"trillion": 1000000000000,
"quadrillion": 1000000000000000,
"quintillion": 1000000000000000000,
}
var seps = regexp.MustCompile(`,|-| and | `)
var zeros = regexp.MustCompile(`^(zero|nought|nil|none|nothing)$`)
func nameToNum(name string) (int64, error) {
text := strings.ToLower(strings.TrimSpace(name))
isNegative := strings.HasPrefix(text, "minus ")
if isNegative {
text = text[6:]
}
if strings.HasPrefix(text, "a ") {
text = "one" + text[1:]
}
words := seps.Split(text, -1)
for i := len(words) - 1; i >= 0; i-- {
if words[i] == "" {
if i < len(words)-1 {
copy(words[i:], words[i+1:])
}
words = words[:len(words)-1]
}
}
size := len(words)
if size == 1 && zeros.MatchString(words[0]) {
return 0, nil
}
var multiplier, lastNum, sum int64 = 1, 0, 0
for i := size - 1; i >= 0; i-- {
num, ok := names[words[i]]
if !ok {
return 0, fmt.Errorf("'%s' is not a valid number", words[i])
} else {
switch {
case num == lastNum, num >= 1000 && lastNum >= 100:
return 0, fmt.Errorf("'%s' is not a well formed numeric string", name)
case num >= 1000:
multiplier = num
if i == 0 {
sum += multiplier
}
case num >= 100:
multiplier *= 100
if i == 0 {
sum += multiplier
}
case num >= 20 && lastNum >= 10 && lastNum <= 90:
return 0, fmt.Errorf("'%s' is not a well formed numeric string", name)
case num >= 20:
sum += num * multiplier
case lastNum >= 1 && lastNum <= 90:
return 0, fmt.Errorf("'%s' is not a well formed numeric string", name)
default:
sum += num * multiplier
}
}
lastNum = num
}
if isNegative && sum == -sum {
return math.MinInt64, nil
}
if sum < 0 {
return 0, fmt.Errorf("'%s' is outside the range of an int64", name)
}
if isNegative {
return -sum, nil
} else {
return sum, nil
}
}
func main() {
names := [...]string{
"none",
"one",
"twenty-five",
"minus one hundred and seventeen",
"hundred and fifty-six",
"minus two thousand two",
"nine thousand, seven hundred, one",
"minus six hundred and twenty six thousand, eight hundred and fourteen",
"four million, seven hundred thousand, three hundred and eighty-six",
"fifty-one billion, two hundred and fifty-two million, seventeen thousand, one hundred eighty-four",
"two hundred and one billion, twenty-one million, two thousand and one",
"minus three hundred trillion, nine million, four hundred and one thousand and thirty-one",
"seventeen quadrillion, one hundred thirty-seven",
"a quintillion, eight trillion and five",
"minus nine quintillion, two hundred and twenty-three quadrillion, three hundred and seventy-two trillion, thirty-six billion, eight hundred and fifty-four million, seven hundred and seventy-five thousand, eight hundred and eight",
}
for _, name := range names {
num, err := nameToNum(name)
if err != nil {
fmt.Println(err)
} else {
fmt.Printf("%20d = %s\n", num, name)
}
}
}
```

- Output:

0 = none 1 = one 25 = twenty-five -117 = minus one hundred and seventeen 156 = hundred and fifty-six -2002 = minus two thousand two 9701 = nine thousand, seven hundred, one -626814 = minus six hundred and twenty six thousand, eight hundred and fourteen 4700386 = four million, seven hundred thousand, three hundred and eighty-six 51252017184 = fifty-one billion, two hundred and fifty-two million, seventeen thousand, one hundred eighty-four 201021002001 = two hundred and one billion, twenty-one million, two thousand and one -300000009401031 = minus three hundred trillion, nine million, four hundred and one thousand and thirty-one 17000000000000137 = seventeen quadrillion, one hundred thirty-seven 1000008000000000005 = a quintillion, eight trillion and five -9223372036854775808 = minus nine quintillion, two hundred and twenty-three quadrillion, three hundred and seventy-two trillion, thirty-six billion, eight hundred and fifty-four million, seven hundred and seventy-five thousand, eight hundred and eight

## Haskell

```
import Data.Char (toLower)
type Symbol = (String, Integer)
type BinOp = (Integer -> Integer -> Integer)
type State = [Transition]
data Transition = Transition [Symbol] State BinOp
| Illion State BinOp
| Done
type Words = [String]
type Accumulator = Integer
type TapeValue = (Accumulator, [Symbol], Words)
ones, teens, tens, hundred, illions :: [Symbol]
ones =
[("one", 1)
,("two", 2)
,("three", 3)
,("four", 4)
,("five", 5)
,("six", 6)
,("seven", 7)
,("eight", 8)
,("nine", 9)]
teens =
[("ten", 10)
,("eleven", 11)
,("twelve", 12)
,("thirteen", 13)
,("fourteen", 14)
,("fifteen", 15)
,("sixteen", 16)
,("seventeen", 17)
,("eighteen", 18)
,("nineteen", 19)]
tens =
[("twenty", 20)
,("thirty", 30)
,("forty", 40)
,("fifty", 50)
,("sixty", 60)
,("seventy", 70)
,("eighty", 80)
,("ninety", 90)]
hundred =
[("hundred", 100)]
illions =
[("quintillion", 10 ^ 18)
,("quadrillion", 10 ^ 15)
,("trillion", 10 ^ 12)
,("billion", 10 ^ 9)
,("million", 10 ^ 6)
,("thousand", 10 ^ 3)]
tokenize :: String -> Words
tokenize = words . (map replace) . (map toLower)
where
replace c
| elem c ['a'..'z'] = c
| otherwise = ' '
lookupRest :: (Eq a) => a -> [(a,b)] -> Maybe (b, [(a,b)])
lookupRest _ [] = Nothing
lookupRest x ((y,z):ws) = if x == y
then Just (z, ws)
else lookupRest x ws
runState :: State -> TapeValue -> TapeValue
runState [] (_, _, word:_) = error $ "Unexpected token: " ++ word
runState _ tv@(_, _, []) = tv
runState (t:ts) tv@(int, illions, word:wx) =
case t of
Transition table state op ->
case lookup word table of
Nothing -> runState ts tv
Just num -> runState state (op num int, illions, wx)
Illion state op ->
case lookupRest word illions of
Nothing -> runState ts tv
Just (num, illions') -> runState state (op num int, illions', wx)
Done -> tv
stateIllion, stateA, stateB, stateC, stateD, stateE :: State
stateIllion = [Illion [Done] (*)]
stateA = [Transition ones stateB (+)
,Transition tens stateD (+)
,Transition teens stateE (+)]
stateB = [Transition hundred stateC (*)]
++ stateIllion
stateC = [Transition ones stateE (+)
,Transition tens stateD (+)
,Transition teens stateE (+)]
++ stateIllion
stateD = [Transition ones stateE (+)]
++ stateIllion
stateE = stateIllion ++ [Done]
parseSubWord :: [Symbol] -> Words -> TapeValue
parseSubWord illions w = runState stateA (0, illions, w)
parse :: [Symbol] -> Words -> Integer
parse _ [] = 0
parse illions wx = let (i, illions', wx') = parseSubWord illions wx
in i + parse illions' wx'
integerSpell :: String -> Integer
integerSpell wx =
case tokenize wx of
("negative":"zero":[]) -> -0
("zero":[]) -> 0
("negative":wx') -> negate $ parse illions wx'
wx' -> parse illions wx'
```

## J

Define the verb usinv to convert number names to numbers. File number_names.ijs contains the code of number names project.

```
NB. standard profile defines tolower and delete extra blanks.
load'number_names.ijs'
NB. replace J's stdlib 'cut' with a variant which supports multi-character delimiters
cut =: #@:[ }.&.> [ (E. <;.1 ]) ,
usinv =: 3 : 0
U =. 'ones' ; }. ENU
A0 =. ;@:(' and'&cut)^:([: +./ ' and '&E.) tolower deb y NB. standardize to us form.
A =. ,&' ones'^:(U -.@e.~ [: {: ;:) A0
B =. ', ' cut A NB. box the comma separated phrases.
C =. ' ' cut L:0 B NB. box words within phrases.
M =. ENU (1000x ^ #@:[ | (i. {:&>)) C NB. powers of 1000
assert *./ 2 >/\ M NB. the phrases properly ordered.
D=. (<'hundred')&cut&> C
M +/ .*+/"1 ,"2 (([: (* 100 ^ 2 ~: #) (#EN100)|EN100&i.)&>)D
)
```

(-: [&.(us :.usinv))0 1 (-: [&.(us :.usinv))2340202340220204 1 (-: [&.:(us :.usinv))2340202340220204x 1

## jq

**Works with gojq, the Go implementation of jq**

```
def check(cond; msg):
if cond then . else msg | error end;
def lpad($len): tostring | ($len - length) as $l | (" " * $l)[:$l] + .;
def trim: sub("^ +";"") | sub(" +$";"");
def when(cond; action):
if cond then action else . end;
def names: {
"one": 1,
"two": 2,
"three": 3,
"four": 4,
"five": 5,
"six": 6,
"seven": 7,
"eight": 8,
"nine": 9,
"ten": 10,
"eleven": 11,
"twelve": 12,
"thirteen": 13,
"fourteen": 14,
"fifteen": 15,
"sixteen": 16,
"seventeen": 17,
"eighteen": 18,
"nineteen": 19,
"twenty": 20,
"thirty": 30,
"forty": 40,
"fifty": 50,
"sixty": 60,
"seventy": 70,
"eighty": 80,
"ninety": 90,
"hundred": 100,
"thousand": 1e3,
"million": 1e6,
"billion": 1e9,
"trillion": 1e12,
"quadrillion": 1e15
};
def zeros: ["zero", "nought", "nil", "none", "nothing"];
def nameToNum:
def seps: ",|-| and | ";
. as $name
| { text: ($name|trim|ascii_downcase) }
| (.text|startswith("minus ")) as $isNegative
| when($isNegative; .text |= (.[6:] | trim)
| when(.text|startswith("a ")); .text = "one" + .text[1:])
| [.text|splits(seps) | select(.!="")] as $words
| ($words|length) as $size
| if $size == 1 and any( zeros[]; . == $words[0]) then .sum = 0
else . + {multiplier: 1, lastNum: 0, sum: 0 }
| reduce range($size-1;-1;-1) as $i (.;
names[$words[$i]] as $num
| check($num; "'\($words[$i])' is not a valid number")
| check($num != .lastNum; "'\($name)' is not a well formed numeric string")
| if ($num >= 1000)
then check(.lastNum < 100; "'\($name)' is not a well formed numeric string")
| .multiplier = $num
| when($i == 0; .sum += .multiplier)
elif $num >= 100
then .multiplier *= 100
| when($i == 0; .sum += .multiplier)
elif $num >= 20
then check(.lastNum < 10 or .lastNum < 90;
"'\($name)' is not a well formed numeric string")
| .sum += $num * .multiplier
else check(.lastNum < 1 or .lastNum > 90;
"'\($name)' is not a well formed numeric string")
| .sum += $num * .multiplier
end
| .lastNum = $num )
end
| if $isNegative then - .sum else .sum end
;
def tests: [
"none",
"one",
"twenty-five",
"minus one hundred and seventeen",
"hundred and fifty-six",
"minus two thousand two",
"nine thousand, seven hundred, one",
"minus six hundred and twenty six thousand, eight hundred and fourteen",
"four million, seven hundred thousand, three hundred and eighty-six",
"fifty-one billion, two hundred and fifty-two million, seventeen thousand, one hundred eighty-four",
"two hundred and one billion, twenty-one million, two thousand and one",
"minus three hundred trillion, nine million, four hundred and one thousand and thirty-one",
"one quadrillion and one",
"minus nine quadrillion, one hundred thirty-seven"
];
tests[]
| "\(nameToNum|lpad(17)) = \(.)"
```

- Output:

Exactly as for Wren.

## Julia

```
const stext = ["one", "two", "three", "four", "five",
"six", "seven", "eight", "nine"]
const teentext = ["eleven", "twelve", "thirteen", "fourteen",
"fifteen", "sixteen", "seventeen",
"eighteen", "nineteen"]
const tenstext = ["ten", "twenty", "thirty", "forty", "fifty",
"sixty", "seventy", "eighty", "ninety"]
const ordstext = ["million", "billion", "trillion",
"quadrillion", "quintillion", "sextillion",
"septillion", "octillion", "nonillion",
"decillion", "undecillion", "duodecillion",
"tredecillion", "quattuordecillion", "quindecillion",
"sexdecillion", "septendecillion", "octodecillion",
"novemdecillion", "vigintillion"]
allnumeric = vcat(
stext, teentext, tenstext, ordstext, ["minus", "and", "hundred", "thousand", "zero"]
)
canon(word) = replace(lowercase(word), r"\-|\,|\.|\:" => "")
isnumeric(word) = canon(word) in allnumeric
function parsenumericphrases(txt)
words = split(strip(txt), r"(\s+)|(\s*\-\s*)")
phrases, num, alph = Vector{Pair{Bool, Vector{String}}}(), false, false
for (i, word) in enumerate(words)
if isnumeric(word) && (num || word != "and")
if !num
push!(phrases, Pair(true, String[]))
num, alph = true, false
end
if word != "and"
push!(phrases[end][2], canon(word))
end
else
if !alph
push!(phrases, Pair(false, String[]))
num, alph = false, true
if length(phrases) > 1 && !occursin(r"\w", words[i - 1][end:end])
word = words[i - 1][end] * " " * word
end
end
push!(phrases[end][2], word)
end
end
return phrases
end
function sumones(word, total)
n = something(findfirst(x -> x == word, stext), 0)
x = something(findfirst(x -> x == word, teentext), 0)
(x > 0) && (n += (10 + x))
n += something(findfirst(x -> x == word, tenstext), 0) * 10
return n + total
end
sumhundreds(word, total) = word == "hundred" ? total *= 100 : total
function summils(word, miltotal, onestotal)
if word == "thousand"
return miltotal + onestotal * 1000, 0
elseif (x = something(findfirst(x -> x == word, ordstext), 0)) > 0
return miltotal + onestotal * 1000^(x + 1), 0
else
return miltotal, onestotal
end
end
function texttointeger(txt)
phrasepairs, outputphrases = parsenumericphrases(txt), String[]
for phrase in phrasepairs
if phrase[1] # numeric phrase
wordarray, sign, onestotal, miltotal = phrase[2], 1, 0, 0
for word in wordarray
onestotal = sumones(word, onestotal)
onestotal = sumhundreds(word, onestotal)
miltotal, onestotal = summils(word, miltotal, onestotal)
end
push!(outputphrases, string(sign * (onestotal + miltotal)))
else # non-numeric phrase
push!(outputphrases, join(phrase[2], " "))
end
end
return replace(join(outputphrases, " "), r"([\w\d])\s(\,|\:|\;|\.)" => s"\1\2")
end
const examples = """
One Hundred and One Dalmatians
Two Thousand and One: A Space Odyssey
Four Score And Seven Years Ago
twelve dozen is one hundred forty-four, aka one gross
two hundred pairs of socks
Always give one hundred and ten percent effort
Change due: zero dollars and thirty-seven cents
One hour, fifty-nine minutes, forty point two seconds
Two Thousand Nineteen
Two Thousand Zero Hundred and Nineteen
Two Thousand Ten Nine
one thousand one
ninety nine thousand nine hundred ninety nine
five hundred and twelve thousand, six hundred and nine
two billion, one hundred
One Thousand One Hundred Eleven
Eleven Hundred Eleven
one hundred eleven billion one hundred eleven
Eight Thousand Eight Hundred Eighty-Eight
Eighty-Eight Hundred Eighty-Eight
one quadrillion, two trillion, three billion, four million, five thousand six
"""
for txt in split(strip(examples), r"\n")
println(txt, " => ", texttointeger(txt))
end
```

- Output:

One Hundred and One Dalmatians => 101 Dalmatians Two Thousand and One: A Space Odyssey => 2001: A Space Odyssey Four Score And Seven Years Ago => 4 Score 7 Years Ago twelve dozen is one hundred forty-four, aka one gross => 12 dozen is 144, aka 1 gross two hundred pairs of socks => 200 pairs of socks Always give one hundred and ten percent effort => Always give 110 percent effort Change due: zero dollars and thirty-seven cents => Change due: 0 dollars and 37 cents One hour, fifty-nine minutes, forty point two seconds => 1 hour, 59 minutes, 40 point 2 seconds Two Thousand Nineteen => 2019 Two Thousand Zero Hundred and Nineteen => 2019 Two Thousand Ten Nine => 2019 one thousand one => 1001 ninety nine thousand nine hundred ninety nine => 99999 five hundred and twelve thousand, six hundred and nine => 512609 two billion, one hundred => 2000000100 One Thousand One Hundred Eleven => 1111 Eleven Hundred Eleven => 1111 one hundred eleven billion one hundred eleven => 111000000111 Eight Thousand Eight Hundred Eighty-Eight => 8888 Eighty-Eight Hundred Eighty-Eight => 8888 one quadrillion, two trillion, three billion, four million, five thousand six => 1002003004005006

## Kotlin

```
// version 1.1.2
val names = mapOf<String, Long>(
"one" to 1,
"two" to 2,
"three" to 3,
"four" to 4,
"five" to 5,
"six" to 6,
"seven" to 7,
"eight" to 8,
"nine" to 9,
"ten" to 10,
"eleven" to 11,
"twelve" to 12,
"thirteen" to 13,
"fourteen" to 14,
"fifteen" to 15,
"sixteen" to 16,
"seventeen" to 17,
"eighteen" to 18,
"nineteen" to 19,
"twenty" to 20,
"thirty" to 30,
"forty" to 40,
"fifty" to 50,
"sixty" to 60,
"seventy" to 70,
"eighty" to 80,
"ninety" to 90,
"hundred" to 100,
"thousand" to 1_000,
"million" to 1_000_000,
"billion" to 1_000_000_000,
"trillion" to 1_000_000_000_000L,
"quadrillion" to 1_000_000_000_000_000L,
"quintillion" to 1_000_000_000_000_000_000L
)
val zeros = listOf("zero", "nought", "nil", "none", "nothing")
fun nameToNum(name: String): Long {
var text = name.trim().toLowerCase()
val isNegative = text.startsWith("minus ")
if (isNegative) text = text.drop(6)
if (text.startsWith("a ")) text = "one" + text.drop(1)
val words = text.split(",", "-", " and ", " ").filter { it != "" }
val size = words.size
if (size == 1 && words[0] in zeros) return 0L
var multiplier = 1L
var lastNum = 0L
var sum = 0L
for (i in size - 1 downTo 0) {
val num: Long? = names[words[i]]
if (num == null)
throw IllegalArgumentException("'${words[i]}' is not a valid number")
else if (num == lastNum)
throw IllegalArgumentException("'$name' is not a well formed numeric string")
else if (num >= 1000) {
if (lastNum >= 100)
throw IllegalArgumentException("'$name' is not a well formed numeric string")
multiplier = num
if (i == 0) sum += multiplier
} else if (num >= 100) {
multiplier *= 100
if (i == 0) sum += multiplier
} else if (num >= 20) {
if (lastNum in 10..90)
throw IllegalArgumentException("'$name' is not a well formed numeric string")
sum += num * multiplier
} else {
if (lastNum in 1..90)
throw IllegalArgumentException("'$name' is not a well formed numeric string")
sum += num * multiplier
}
lastNum = num
}
if (isNegative && sum == -sum)
return Long.MIN_VALUE
else if (sum < 0L)
throw IllegalArgumentException("'$name' is outside the range of a Long integer")
return if (isNegative) -sum else sum
}
fun main(args: Array<String>) {
val names = arrayOf(
"none",
"one",
"twenty-five",
"minus one hundred and seventeen",
"hundred and fifty-six",
"minus two thousand two",
"nine thousand, seven hundred, one",
"minus six hundred and twenty six thousand, eight hundred and fourteen",
"four million, seven hundred thousand, three hundred and eighty-six",
"fifty-one billion, two hundred and fifty-two million, seventeen thousand, one hundred eighty-four",
"two hundred and one billion, twenty-one million, two thousand and one",
"minus three hundred trillion, nine million, four hundred and one thousand and thirty-one",
"seventeen quadrillion, one hundred thirty-seven",
"a quintillion, eight trillion and five",
"minus nine quintillion, two hundred and twenty-three quadrillion, three hundred and seventy-two trillion, thirty-six billion, eight hundred and fifty-four million, seven hundred and seventy-five thousand, eight hundred and eight"
)
for (name in names) println("${"%20d".format(nameToNum(name))} = $name")
}
```

- Output:

## Nim

```
import re, sequtils, strformat, strutils, tables
const Names = {"one": 1u64,
"two": 2u64,
"three": 3u64,
"four": 4u64,
"five": 5u64,
"six": 6u64,
"seven": 7u64,
"eight": 8u64,
"nine": 9u64,
"ten": 10u64,
"eleven": 11u64,
"twelve": 12u64,
"thirteen": 13u64,
"fourteen": 14u64,
"fifteen": 15u64,
"sixteen": 16u64,
"seventeen": 17u64,
"eighteen": 18u64,
"nineteen": 19u64,
"twenty": 20u64,
"thirty": 30u64,
"forty": 40u64,
"fifty": 50u64,
"sixty": 60u64,
"seventy": 70u64,
"eighty": 80u64,
"ninety": 90u64,
"hundred": 100u64,
"thousand": 1000u64,
"million": 1000000u64,
"billion": 1000000000u64,
"trillion": 1000000000000u64,
"quadrillion": 1000000000000000u64,
"quintillion": 1000000000000000000u64}.toTable
let Seps = re",|-| and | "
const Zeros = ["zero", "nought", "nil", "none", "nothing"]
template emitError(msg: string) = raise newException(ValueError, msg)
proc nameToNum(name: string): int64 =
var text = name.strip().toLowerAscii
let isNegative = text.startsWith("minus ")
if isNegative: text.delete(0, 5)
if text.startsWith("a"):
text = "one" & text[1..^1]
let words = text.split(Seps).filterIt(it.len != 0)
if words.len == 1 and words[0] in Zeros:
return 0
var
multiplier = 1u64
lastNum, sum = 0u64
for i in countdown(words.high, 0):
let num = Names.getOrDefault(words[i], 0)
if num == 0:
emitError(&"'{words[i]}' is not a valid number")
elif num == lastNum:
emitError(&"'{name}' is not a well formed numeric string")
elif num >= 1000:
if lastNum >= 100:
emitError(&"'{name}' is not a well formed numeric string")
multiplier = num
if i == 0: sum += multiplier
elif num >= 100:
multiplier *= 100
if i == 0: sum += multiplier
elif num >= 20:
if lastNum in 10u64..90u64:
emitError(&"'{name}' is not a well formed numeric string")
sum += num * multiplier
else:
if lastNum in 1u64..90u64:
emitError(&"'{name}' is not a well formed numeric string")
sum += num * multiplier
lastNum = num
if isNegative and sum == uint64(int64.high) + 1:
return int64.low
if sum > uint64(int64.high):
emitError(&"'$name' is outside the range of a 64 bits integer")
result = if isNegative: -int64(sum) else: int64(sum)
when isMainModule:
let names = [
"none",
"one",
"twenty-five",
"minus one hundred and seventeen",
"hundred and fifty-six",
"minus two thousand two",
"nine thousand, seven hundred, one",
"minus six hundred and twenty six thousand, eight hundred and fourteen",
"four million, seven hundred thousand, three hundred and eighty-six",
"fifty-one billion, two hundred and fifty-two million, seventeen thousand, one hundred eighty-four",
"two hundred and one billion, twenty-one million, two thousand and one",
"minus three hundred trillion, nine million, four hundred and one thousand and thirty-one",
"seventeen quadrillion, one hundred thirty-seven",
"a quintillion, eight trillion and five",
"minus nine quintillion, two hundred and twenty-three quadrillion, three hundred and seventy-two trillion, thirty-six billion, eight hundred and fifty-four million, seven hundred and seventy-five thousand, eight hundred and eight"]
for name in names:
echo ($nametoNum(name)).align(20), " = ", name
```

- Output:

## Perl

```
use strict;
use warnings;
use feature 'say';
use utf8;
binmode STDOUT, ':utf8';
my $phrases_with_numbers = <<'END';
One Hundred and One Dalmatians
Two Thousand and One: A Space Odyssey
Four Score And Seven Years Ago
twelve dozen is one hundred forty-four, aka one gross
two hundred pairs of socks
Always give one hundred and ten percent effort
Change due: zero dollars and thirty-seven cents
One hour, fifty-nine minutes, forty point two seconds
π ≅ three point one four one five nine
END
my $pure_numbers = <<'END';
Twenty Nineteen
Two Thousand Nineteen
Two Thousand Zero Hundred and Nineteen
Two Thousand Ten Nine
one thousand one
ninety nine thousand nine hundred ninety nine
five hundred and twelve thousand, six hundred and nine
two billion, one hundred
One Thousand One Hundred Eleven
Eleven Hundred Eleven
one hundred eleven billion one hundred eleven
Eight Thousand Eight Hundred Eighty-Eight
Eighty-Eight Hundred Eighty-Eight
one quadrillion, two trillion, three billion, four million, five thousand six
END
my %nums = (
zero => 0, one => 1, two => 2, three => 3,
four => 4, five => 5, six => 6, seven => 7,
eight => 8, nine => 9, ten => 10, eleven => 11,
twelve => 12, thirteen => 13, fourteen => 14, fifteen => 15,
sixteen => 16, seventeen => 17, eighteen => 18, nineteen => 19,
twenty => 20, thirty => 30, forty => 40, fifty => 50,
sixty => 60, seventy => 70, eighty => 80, ninety => 90,
hundred => 100, thousand => 1_000, million => 1_000_000,
billion => 1_000_000_000, trillion => 1_000_000_000_000,
quadrillion => 1_000_000_000_000_000
);
# Groupings for thousands, millions, ... quadrillions
my $groups = qr/\d{4}|\d{7}|\d{10}|\d{13}|\d{16}/;
sub sum {
my($values) = @_;
my $sum = 0;
$sum += $_ for split ' ', $values;
$sum;
}
sub squeeze {
my($str) = @_;
$str =~ s/[\-\s]+/ /g;
$str =~ s/^\s*(.*?)\s*$/$1/r;
}
# commify larger numbers for readabilty
sub comma {
my($i) = @_;
return $i if length($i) < 5;
reverse ((reverse $i) =~ s/(.{3})/$1,/gr) =~ s/^,//r
}
sub numify {
my($str) = @_;
$str =~ tr/A-Z/a-z/;
$str = squeeze($str);
$str =~ s/(.)([[:punct:]])/$1 $2/g;
foreach my $key (keys %nums) { $str =~ s/ \b $key \b /$nums{$key}/gx }
$str =~ s/(\d+) \s+ (?=\d)/$1/gx if $str =~ /point (\d )+/;
$str =~ s/(\d+) \s+ score / $1 * 20 /egx;
$str =~ s/(\d) (?:,|and) (\d)/$1 $2/g;
$str =~ s/\b (\d) \s+ 100 \s+ (\d\d) \s+ (\d) \s+ ($groups) \b / ($1 * 100 + $2 + $3) * $4 /egx;
$str =~ s/\b (\d) \s+ 100 \s+ (\d{1,2}) \s+ ($groups) \b / ($1 * 100 + $2) * $3 /egx;
$str =~ s/\b (\d) \s+ 100 \s+ ($groups) \b / $1 * 100 * $2 /egx;
$str =~ s/\b \s+ 100 \s+ (\d\d) \s+ (\d) \s+ ($groups) \b / ($1 + 100 + $2) * $3 /egx;
$str =~ s/\b \s+ 100 \s+ (\d{1,2}) \s+ ($groups) \b / ($1 + 100 ) * $2 /egx;
$str =~ s/\b \s+ 100 \s+ ($groups) \b / $1 * 100 /egx;
$str =~ s/\b (\d\d) \s+ (\d) \s+ ($groups) \b / ($1 + $2) * $3 /egx;
$str =~ s/\b (\d{1,2}) \s+ ($groups) \b / $1 * $2 /egx;
$str =~ s/\b (\d\d) \s+ (\d) \s+ 100 \b / ($1 + $2) * 100 /egx;
$str =~ s/\b (\d{1,2}) \s+ 100 \b / $1 * 100 /egx;
$str =~ s/\b (\d{2}) \s+ (\d{2}) \b / $1 * 100 + $2 /egx;
$str =~ s/((?:\d+ )*\d+)/sum $1/eg;
$str =~ s/(\d+) \s+ pairs.of / $1 * 2 /egx;
$str =~ s/(\d+) \s+ dozen / $1 * 12 /egx;
$str =~ s/(\d+) \s+ point \s+ (\d+) / $1.$2 /gx;
$str =~ s/(\d+) \s+ percent / $1% /gx;
$str =~ s/(\d+) \s+ dollars / \$$1 /gx;
$str =~ s/(\d+) \s+ cents / $1¢ /gx;
squeeze $str;
}
say $_ . ' --> ' . numify($_) for grep { $_ } split "\n", $phrases_with_numbers;
say $_ . ' --> ' . comma numify($_) for grep { $_ } split "\n", $pure_numbers;
```

One Hundred and One Dalmatians --> 101 dalmatians Two Thousand and One: A Space Odyssey --> 2001 : a space odyssey Four Score And Seven Years Ago --> 87 years ago twelve dozen is one hundred forty-four, aka one gross --> 144 is 144 , aka 1 gross two hundred pairs of socks --> 400 socks Always give one hundred and ten percent effort --> always give 110% effort Change due: zero dollars and thirty-seven cents --> change due : $0 and 37¢ One hour, fifty-nine minutes, forty point two seconds --> 1 hour , 509 minutes , 40.2 seconds π ≅ three point one four one five nine --> π ≅ 3.14159 Twenty Nineteen --> 2019 Two Thousand Nineteen --> 2019 Two Thousand Zero Hundred and Nineteen --> 2019 Two Thousand Ten Nine --> 2019 one thousand one --> 1001 ninety nine thousand nine hundred ninety nine --> 99,999 five hundred and twelve thousand, six hundred and nine --> 512,609 two billion, one hundred --> 2,000,000,100 One Thousand One Hundred Eleven --> 1111 Eleven Hundred Eleven --> 1111 one hundred eleven billion one hundred eleven --> 111,000,000,111 Eight Thousand Eight Hundred Eighty-Eight --> 8888 Eighty-Eight Hundred Eighty-Eight --> 8888 one quadrillion, two trillion, three billion, four million, five thousand six --> 1,002,003,004,005,006

## Phix

Uses Number_names as an executable library.

-- -- demo\rosetta\Names_to_numbers.exw -- --------------------------------- -- with javascript_semantics include demo\rosetta\Number_names.exw constant {tokens,tokvals} = columnize({{"zero",0},{"one",1},{"two",2},{"three",3},{"four",4},{"five",5},{"six",6}, {"seven",7},{"eight",8},{"nine",9},{"ten",10}, {"eleven",11},{"twelve",12},{"thirteen",13},{"fourteen",14},{"fifteen",15}, {"sixteen",16},{"seventeen",17},{"eighteen",18},{"nineteen",19}, {"twenty",20},{"thirty",30},{"forty",40},{"fifty",50},{"sixty",60}, {"seventy",70},{"eighty",80},{"ninety",90},{"hundred",100},{"thousand",1e3}, {"million",1e6},{"billion",1e9},{"trillion",1e12}}) function parse(string s) s = substitute(s,",","") s = substitute(s," and "," ") s = substitute(s,"-"," ") sequence words = split(s) if length(words)=0 then return "invalid" end if integer negmul = 1, hund = 0 if words[1]=="minus" then negmul = -1 words = words[2..$] end if atom total = 0 for i=1 to length(words) do atom k = find(words[i],tokens) if k=0 then if words[i]!="point" then return "invalid" end if total += hund hund = 0 integer tens = 10 for j=i+1 to length(words) do k = find(words[j],tokens) if k=0 then return "invalid" end if k = tokvals[k] if k>9 then return "invalid" end if total += k/tens tens *= 10 end for exit end if k = tokvals[k] if k<100 then hund += k elsif k=100 then hund *= k else total += hund*k hund = 0 end if end for return negmul*(total+hund) end function for i=1 to length(samples) do atom si = samples[i] string s = spell(si) if abs(parse(s)-si)<1e-6 then s = "<==> "&s else s = "???? "&s end if printf(1,"%18s %s\n",{smartp(si),s}) end for {} = wait_key()

- Output:

99 <==> ninety-nine 300 <==> three hundred 310 <==> three hundred and ten 417 <==> four hundred and seventeen 1501 <==> one thousand, five hundred and one 12609 <==> twelve thousand, six hundred and nine 200000000000100 <==> two hundred trillion, and one hundred 999999999999999 <==> nine hundred and ninety-nine trillion, nine hundred and ninety-nine billion, nine hundred and ninety-nine million, nine hundred and ninety-nine thousand, nine hundred and ninety-nine -123456787654321 <==> minus one hundred and twenty-three trillion, four hundred and fifty-six billion, seven hundred and eighty-seven million, six hundred and fifty-four thousand, three hundred and twenty-one 102003000400005 <==> one hundred and two trillion, three billion, four hundred thousand, and five 1020030004 <==> one billion, twenty million, thirty thousand, and four 102003 <==> one hundred and two thousand, and three 102 <==> one hundred and two 1 <==> one 0 <==> zero -1 <==> minus one -99 <==> minus ninety-nine -1501 <==> minus one thousand, five hundred and one 1234 <==> one thousand, two hundred and thirty-four 12.34 <==> twelve point three four 10000001.2 <==> ten million, and one point two 0.001 <==> zero point zero zero one -2.7182818 <==> minus two point seven one eight two eight one eight 201021002001 <==> two hundred and one billion, twenty-one million, two thousand, and one -20102100200 <==> minus twenty billion, one hundred and two million, one hundred thousand, and two hundred 2010210020 <==> two billion, ten million, two hundred and ten thousand, and twenty -201021002 <==> minus two hundred and one million, twenty-one thousand, and two 20102100 <==> twenty million, one hundred and two thousand, and one hundred -2010210 <==> minus two million, ten thousand, two hundred and ten 201021 <==> two hundred and one thousand, and twenty-one -20102 <==> minus twenty thousand, one hundred and two 2010 <==> two thousand, and ten -201 <==> minus two hundred and one 20 <==> twenty -2 <==> minus two

## Python

This example assumes that the module from Number_names#Python is stored as spell_integer.py.

The example understands the textual format generated from number-to-names module.

Note: This example and Number_names#Python need to be kept in sync

```
from spell_integer import spell_integer, SMALL, TENS, HUGE
def int_from_words(num):
words = num.replace(',','').replace(' and ', ' ').replace('-', ' ').split()
if words[0] == 'minus':
negmult = -1
words.pop(0)
else:
negmult = 1
small, total = 0, 0
for word in words:
if word in SMALL:
small += SMALL.index(word)
elif word in TENS:
small += TENS.index(word) * 10
elif word == 'hundred':
small *= 100
elif word == 'thousand':
total += small * 1000
small = 0
elif word in HUGE:
total += small * 1000 ** HUGE.index(word)
small = 0
else:
raise ValueError("Don't understand %r part of %r" % (word, num))
return negmult * (total + small)
if __name__ == '__main__':
# examples
for n in range(-10000, 10000, 17):
assert n == int_from_words(spell_integer(n))
for n in range(20):
assert 13**n == int_from_words(spell_integer(13**n))
print('\n##\n## These tests show <==> for a successful round trip, otherwise <??>\n##\n')
for n in (0, -3, 5, -7, 11, -13, 17, -19, 23, -29):
txt = spell_integer(n)
num = int_from_words(txt)
print('%+4i <%s> %s' % (n, '==' if n == num else '??', txt))
print('')
n = 201021002001
while n:
txt = spell_integer(n)
num = int_from_words(txt)
print('%12i <%s> %s' % (n, '==' if n == num else '??', txt))
n //= -10
txt = spell_integer(n)
num = int_from_words(txt)
print('%12i <%s> %s' % (n, '==' if n == num else '??', txt))
print('')
```

- Output:

## ## These tests show <==> for a successful round trip, otherwise <??> ## +0 <==> zero -3 <==> minus three +5 <==> five -7 <==> minus seven +11 <==> eleven -13 <==> minus thirteen +17 <==> seventeen -19 <==> minus nineteen +23 <==> twenty-three -29 <==> minus twenty-nine 201021002001 <==> two hundred and one billion, twenty-one million, two thousand, and one -20102100201 <==> minus twenty billion, one hundred and two million, one hundred thousand, two hundred and one 2010210020 <==> two billion, ten million, two hundred and ten thousand, and twenty -201021002 <==> minus two hundred and one million, twenty-one thousand, and two 20102100 <==> twenty million, one hundred and two thousand, and one hundred -2010210 <==> minus two million, ten thousand, two hundred and ten 201021 <==> two hundred and one thousand, and twenty-one -20103 <==> minus twenty thousand, one hundred and three 2010 <==> two thousand, and ten -201 <==> minus two hundred and one 20 <==> twenty -2 <==> minus two 0 <==> zero

## Quackery

The idea is that, with a few tweaks and appropriate definitions for number names etc, a string such as

one billion, two hundred and thirty four million, five hundred and sixty seven thousand, eight hundred and ninety

can *be* a valid Quackery program.
The tweaks turn it into the nest

[ {{ one billion , two hundred thirty four million , five hundred sixty seven thousand , eight hundred ninety }} ]

by prepending `{{ `

, inserting a space in front of each comma, and appending ` }}`

before being compiled with `build`

, and removing references to the word `and`

after compilation.

Finally, the compiled nest is executed with `do`

.

```
[ 1 + ] is one ( --> n )
[ 2 + ] is two ( --> n )
[ 3 + ] is three ( --> n )
[ 4 + ] is four ( --> n )
[ 5 + ] is five ( --> n )
[ 6 + ] is six ( --> n )
[ 7 + ] is seven ( --> n )
[ 8 + ] is eight ( --> n )
[ 9 + ] is nine ( --> n )
[ 10 + ] is ten ( --> n )
[ 11 + ] is eleven ( --> n )
[ 12 + ] is twelve ( --> n )
[ 13 + ] is thirteen ( --> n )
[ 14 + ] is fourteen ( --> n )
[ 15 + ] is fifteen ( --> n )
[ 16 + ] is sixteen ( --> n )
[ 17 + ] is seventeen ( --> n )
[ 18 + ] is eighteen ( --> n )
[ 19 + ] is nineteen ( --> n )
[ 20 + ] is twenty ( --> n )
[ 30 + ] is thirty ( --> n )
[ 40 + ] is forty ( --> n )
[ 50 + ] is fifty ( --> n )
[ 60 + ] is sixty ( --> n )
[ 70 + ] is seventy ( --> n )
[ 80 + ] is eighty ( --> n )
[ 90 + ] is ninety ( --> n )
[ 100 * ] is hundred ( n --> n )
[ 1000 * ] is thousand ( n --> n )
[ thousand thousand ] is million ( n --> n )
[ thousand million ] is billion ( n --> n )
[ 0 0 ] is {{ ( --> n n )
[ + 0 ] is , ( n n --> n n )
[ + ] is }} ( n n --> n )
[ $ "{{ " swap
witheach
[ dup char , = if
[ dip space join ]
join ]
$ " }}" join
build
[]
swap witheach
[ dup ' and = iff
drop
else
[ nested join ] ]
do ] is name->number ( $ --> n )
$ "one billion, two hundred and thirty four million, five hundred and sixty seven thousand, eight hundred and ninety"
name->number echo
```

- Output:

1234567890

## Racket

Extension of the number to names code:

```
#lang racket
(define smalls
(map symbol->string
'(zero one two three four five six seven eight nine ten eleven twelve
thirteen fourteen fifteen sixteen seventeen eighteen nineteen)))
(define tens
(map symbol->string
'(zero ten twenty thirty forty fifty sixty seventy eighty ninety)))
(define larges
(map symbol->string
'(thousand million billion trillion quadrillion quintillion sextillion
septillion octillion nonillion decillion undecillion duodecillion
tredecillion quattuordecillion quindecillion sexdecillion
septendecillion octodecillion novemdecillion vigintillion)))
(define (integer->english n)
(define (step div suffix separator [subformat integer->english])
(define-values [q r] (quotient/remainder n div))
(define S (if suffix (~a (subformat q) " " suffix) (subformat q)))
(if (zero? r) S (~a S separator (integer->english r))))
(cond [(< n 0) (~a "negative " (integer->english (- n)))]
[(< n 20) (list-ref smalls n)]
[(< n 100) (step 10 #f "-" (curry list-ref tens))]
[(< n 1000) (step 100 "hundred" " and ")]
[else (let loop ([N 1000000] [D 1000] [unit larges])
(cond [(null? unit)
(error 'integer->english "number too big: ~e" n)]
[(< n N) (step D (car unit) ", ")]
[else (loop (* 1000 N) (* 1000 D) (cdr unit))]))]))
(define (english->integer str)
(define (word->integer word)
(or (for/first ([s (in-list smalls)] [n (in-naturals)]
#:when (equal? word s))
n)
(for/first ([s (in-list tens)] [n (in-naturals)]
#:when (equal? word s))
(* 10 n))
(for/first ([s (in-list larges)] [n (in-naturals 1)]
#:when (equal? word s))
(expt 10 (* 3 n)))
0))
(for/sum ([part (in-list (string-split str #rx" *, *"))])
(let loop ([part (regexp-split #rx"[ -]" part)] [sum 0])
(match part
[(list n)
(let ([n (word->integer n)]) (if (< 999 n) (* sum n) (+ sum n)))]
[(list n "hundred" rest ...)
(loop rest (+ sum (* 100 (word->integer n))))]
[(list n rest ...)
(loop rest (+ sum (word->integer n)))]
[_ sum]))))
(for ([size 10])
(define e (expt 10 size))
(define n (+ (* e (random e)) (random e)))
(define eng (integer->english n))
(define n2 (english->integer eng))
(if (= n2 n)
(printf "~s <-> ~a\n" n eng)
(printf "Fail: ~s -> ~a -> ~s\n" n eng n2)))
```

- Output:

0 <-> zero 90 <-> ninety 361 <-> three hundred and sixty-one 528142 <-> five hundred and twenty-eight thousand, one hundred and forty-two 92596865 <-> ninety-two million, five hundred and ninety-six thousand, eight hundred and sixty-five 690856444 <-> six hundred and ninety million, eight hundred and fifty-six thousand, four hundred and forty-four 245479718757 <-> two hundred and forty-five billion, four hundred and seventy-nine million, seven hundred and eighteen thousand, seven hundred and fifty-seven 37308165785935 <-> thirty-seven trillion, three hundred and eight billion, one hundred and sixty-five million, seven hundred and eighty-five thousand, nine hundred and thirty-five 7878883296406183 <-> seven quadrillion, eight hundred and seventy-eight trillion, eight hundred and eighty-three billion, two hundred and ninety-six million, four hundred and six thousand, one hundred and eighty-three 552966175718680570 <-> five hundred and fifty-two quadrillion, nine hundred and sixty-six trillion, one hundred and seventy-five billion, seven hundred and eighteen million, six hundred and eighty thousand, five hundred and seventy

## Raku

(formerly Perl 6)

```
my $phrases-with-numbers = q:to/END/;
One Hundred and One Dalmatians
Two Thousand and One: A Space Odyssey
Four Score And Seven Years Ago
twelve dozen is one hundred forty-four, aka one gross
two hundred pairs of socks
Always give one hundred and ten percent effort
Change due: zero dollars and thirty-seven cents
One hour, fifty-nine minutes, forty point two seconds
π ≅ three point one four one five nine
END
my $pure-numbers = q:to/END/;
Twenty Nineteen
Two Thousand Nineteen
Two Thousand Zero Hundred and Nineteen
Two Thousand Ten Nine
one thousand one
ninety nine thousand nine hundred ninety nine
five hundred and twelve thousand, six hundred and nine
two billion, one hundred
One Thousand One Hundred Eleven
Eleven Hundred Eleven
one hundred eleven billion one hundred eleven
Eight Thousand Eight Hundred Eighty-Eight
Eighty-Eight Hundred Eighty-Eight
Forty-two quintillion, one quadrillion, two trillion, three billion, four million, five thousand six
END
my %nums = (
zero => 0, one => 1, two => 2, three => 3,
four => 4, five => 5, six => 6, seven => 7,
eight => 8, nine => 9, ten => 10, eleven => 11,
twelve => 12, thirteen => 13, fourteen => 14, fifteen => 15,
sixteen => 16, seventeen => 17, eighteen => 18, nineteen => 19,
twenty => 20, thirty => 30, forty => 40, fifty => 50,
sixty => 60, seventy => 70, eighty => 80, ninety => 90,
hundred => 100, thousand => 1_000, million => 1_000_000,
billion => 1_000_000_000, trillion => 1_000_000_000_000,
quadrillion => 1_000_000_000_000_000, quintillion => 1_000_000_000_000_000_000
);
# groupings: thousand million billion trillion quadrillion quintillion
my token groups { \d**4 | \d**7 | \d**10 | \d**13 | \d**16 | \d**19 };
# remove hyphens/spaces: leading, trailing, multiple
sub squeeze ($str is copy) { $str ~~ s:g/'-' | \s+ / /; $str .=trim }
# commify larger numbers for readabilty
sub comma { $^i.chars > 4 ?? $^i.flip.comb(3).join(',').flip !! $^i }
sub numify ($str is copy) {
$str = squeeze $str.lc;
$str ~~ s:g/(.)(<punct>)/$0 $1/;
for %nums.kv -> $word, $number { $str ~~ s:g/ <|w> $word <|w> / $number / }
$str ~~ s:g/(\d+)<ws> <?before \d>/$0/ if $str ~~ /(point )<ws>[(\d)<ws>]+$/;
$str ~~ s:g/(\d+) <ws> 'score' / {$0 * 20} /;
$str ~~ s:g/(\d) <ws> [','|'and'] <ws> (\d)/$0 $1/;
$str ~~ s:g/ <|w> (\d) <ws> 100 <ws> (\d\d) <ws> (\d) <ws> (<groups>) <|w> / {($0 * 100 + $1 + $2) * $3} /;
$str ~~ s:g/ <|w> (\d) <ws> 100 <ws> (\d ** 1..2) <ws> (<groups>) <|w> / {($0 * 100 + $1) * $2} /;
$str ~~ s:g/ <|w> (\d) <ws> 100 <ws> (<groups>) <|w> / { $0 * 100 * $1} /;
$str ~~ s:g/ <|w> <ws> 100 <ws> (\d\d) <ws> (\d) <ws> (<groups>) <|w> / {($0 + 100 + $1) * $2} /;
$str ~~ s:g/ <|w> <ws> 100 <ws> (\d ** 1..2) <ws> (<groups>) <|w> / {($0 + 100 ) * $1} /;
$str ~~ s:g/ <|w> <ws> 100 <ws> (<groups>) <|w> / { $0 * 100} /;
$str ~~ s:g/ <|w> (\d\d) <ws> (\d) <ws> (<groups>) <|w> / {($0 + $1) * $2} /;
$str ~~ s:g/ <|w> (\d ** 1..2) <ws> (<groups>) <|w> / { $0 * $1} /;
$str ~~ s:g/ <|w> (\d\d) <ws> (\d) <ws> 100 <|w> / {($0 + $1) * 100} /;
$str ~~ s:g/ <|w> (\d ** 1..2) <ws> 100 <|w> / { $0 * 100} /;
$str ~~ s:g/ <|w> (\d ** 2)<ws>(\d ** 2) <|w> / { $0 * 100 + $1} /;
$str ~~ s:g/( [\d+<ws>]* \d+ ) / {[+] $0.split: ' '} /;
$str ~~ s:g/(\d+) <ws> 'pairs of' / {$0 * 2} /;
$str ~~ s:g/(\d+) <ws> 'dozen' / {$0 * 12} /;
$str ~~ s:g/(\d+) <ws> 'point' <ws> (\d+) / $0.$1 /;
$str ~~ s:g/(\d+) <ws> 'percent' / $0% /;
$str ~~ s:g/(\d+) <ws> 'dollars' / \$$0 /;
$str ~~ s:g/(\d+) <ws> 'cents' / $0¢ /;
squeeze $str;
}
say $_ ~ ' --> ' ~ .&numify for $phrases-with-numbers.split("\n").grep: *.so;
say $_ ~ ' --> ' ~ .&numify.&comma for $pure-numbers.split("\n").grep: *.so;
```

- Output:

One Hundred and One Dalmatians --> 101 dalmatians Two Thousand and One: A Space Odyssey --> 2001 : a space odyssey Four Score And Seven Years Ago --> 87 years ago twelve dozen is one hundred forty-four, aka one gross --> 144 is 144 , aka 1 gross two hundred pairs of socks --> 400 socks Always give one hundred and ten percent effort --> always give 110% effort Change due: zero dollars and thirty-seven cents --> change due : $0 and 37¢ One hour, fifty-nine minutes, forty point two seconds --> 1 hour , 59 minutes , 40.2 seconds π ≅ three point one four one five nine --> π ≅ 3.14159 Twenty Nineteen --> 2019 Two Thousand Nineteen --> 2019 Two Thousand Zero Hundred and Nineteen --> 2019 Two Thousand Ten Nine --> 2019 one thousand one --> 1001 ninety nine thousand nine hundred ninety nine --> 99,999 five hundred and twelve thousand, six hundred and nine --> 512,609 two billion, one hundred --> 2,000,000,100 One Thousand One Hundred Eleven --> 1111 Eleven Hundred Eleven --> 1111 one hundred eleven billion one hundred eleven --> 111,000,000,111 Eight Thousand Eight Hundred Eighty-Eight --> 8888 Eighty-Eight Hundred Eighty-Eight --> 8888 Forty-two quintillion, one quadrillion, two trillion, three billion, four million, five thousand six --> 42,001,002,003,004,005,006

## Ruby

This solution uses "Number names" from here

```
require 'number_names'
def int_from_words(num)
words = num.downcase.gsub(/(,| and |-)/,' ').split
if words[0] =~ /(minus|negative)/
negmult = -1
words.shift
else
negmult = 1
end
small, total = 0, 0
for word in words
case word
when *SMALL
small += SMALL.index(word)
when *TENS
small += TENS.index(word) * 10
when 'hundred'
small *= 100
when 'thousand'
total += small * 1000
small = 0
when *BIG
total += small * 1000 ** BIG.index(word)
small = 0
else
raise ArgumentError, "Don't understand %s part of %s" % [word, num]
end
end
negmult * (total + small)
end
```

Examples:

```
for n in (-10000..10000).step(17)
raise unless n == int_from_words(wordify(n))
end
for n in 0...20
raise unless 13**n == int_from_words(wordify(13**n))
end
puts "##\n## These tests show <==> for a successful round trip, otherwise <??>\n##"
for n in [0, -3, 5, -7, 11, -13, 17, -19, 23, -29]
txt = wordify(n)
num = int_from_words(txt)
puts '%+4i <%s> %s' % [n, n==num ? '==' : '??', txt]
end
puts
n = 201021002001
loop do
txt = wordify(n)
num = int_from_words(txt)
puts '%12i <%s> %s' % [n, n==num ? '==' : '??', txt]
break if n==0
n /= -10
end
```

- Output:

## ## These tests show <==> for a successful round trip, otherwise <??> ## +0 <==> zero -3 <==> negative three +5 <==> five -7 <==> negative seven +11 <==> eleven -13 <==> negative thirteen +17 <==> seventeen -19 <==> negative nineteen +23 <==> twenty-three -29 <==> negative twenty-nine 201021002001 <==> two hundred and one billion, twenty-one million, two thousand, one -20102100201 <==> negative twenty billion, one hundred and two million, one hundred thousand, two hundred and one 2010210020 <==> two billion, ten million, two hundred and ten thousand, twenty -201021002 <==> negative two hundred and one million, twenty-one thousand, two 20102100 <==> twenty million, one hundred and two thousand, one hundred -2010210 <==> negative two million, ten thousand, two hundred and ten 201021 <==> two hundred and one thousand, twenty-one -20103 <==> negative twenty thousand, one hundred and three 2010 <==> two thousand, ten -201 <==> negative two hundred and one 20 <==> twenty -2 <==> negative two 0 <==> zero

## Sidef

```
func names_to_number(str) {
static nums = Hash.new(
zero => 0, one => 1, two => 2,
three => 3, four => 4, five => 5,
six => 6, seven => 7, eight => 8,
nine => 9, ten => 10, eleven => 11,
twelve => 12, thirteen => 13, fourteen => 14,
fifteen => 15, sixteen => 16, seventeen => 17,
eighteen => 18, nineteen => 19, twenty => 20,
thirty => 30, forty => 40, fifty => 50,
sixty => 60, seventy => 70, eighty => 80,
ninety => 90, hundred => 1e2, thousand => 1e3,
million => 1e6, billion => 1e9, trillion => 1e12,
quadrillion => 1e15, quintillion => 1e18,
);
# Groupings for thousands, millions, ..., quintillions
static groups = /\d{4}|\d{7}|\d{10}|\d{13}|\d{16}|\d{19}/;
# Numeral
static num = /\d+/;
str.trim!; # remove leading and trailing whitespace
str.gsub!('-', ' '); # convert hyphens to spaces
str.words!.join!(' '); # remove duplicate whitespace, convert ws to space
str.lc!; # convert to lower case
# tokenize sentence boundaries
str.gsub!(/([.?!]) /, {|a| ' ' + a + "\n"});
str.gsub!(/([.?!])$/, {|a| ' ' + a + "\n"});
# tokenize other punctuation and symbols
str.gsub!(/\$(.)/, {|a| "$ #{a}" }); # prefix
str.gsub!(/(.)([;:%'',])/, {|a,b| "#{a} #{b}"}); # suffix
nums.each { |key, value| str.gsub!(Regex.new('\b' + key + '\b'), value) };
str.gsub!(/(\d) , (\d)/, {|a,b| a + ' ' + b});
str.gsub!(/(\d) and (\d)/, {|a,b| a + ' ' + b});
static regex = [
Regex.new('\b(\d) 100 (\d\d) (\d) (' + groups + ')\b'),
Regex.new('\b(\d) 100 (\d\d) (' + groups + ')\b'),
Regex.new('\b(\d) 100 (\d) (' + groups + ')\b'),
Regex.new('\b(\d) 100 (' + groups + ')\b'),
Regex.new('\b100 (\d\d) (\d) (' + groups + ')\b'),
Regex.new('\b100 (\d\d) (' + groups + ')\b'),
Regex.new('\b100 (\d) (' + groups + ')\b'),
Regex.new('\b100 (' + groups + ')\b'),
Regex.new('\b(\d\d) (\d) (' + groups + ')\b'),
Regex.new('\b(\d{1,2}) (' + groups + ')\b'),
Regex.new('((?:' + num + ' )*' + num + ')'),
];
str.gsub!(regex[0], {|a,b,c,d| (a.to_i*100 + b.to_i + c.to_i) * d.to_i });
str.gsub!(regex[1], {|a,b,c| (a.to_i*100 + b.to_i) * c.to_i });
str.gsub!(regex[2], {|a,b,c| (a.to_i*100 + b.to_i) * c.to_i });
str.gsub!(regex[3], {|a,b| (a.to_i * b.to_i * 100) });
str.gsub!(regex[4], {|a,b,c| (100 + a.to_i + b.to_i) * c.to_i });
str.gsub!(regex[5], {|a,b| (100 + a.to_i) * b.to_i });
str.gsub!(regex[6], {|a,b| (100 + a.to_i) * b.to_i });
str.gsub!(regex[7], {|a| (a.to_i * 100) });
str.gsub!(regex[8], {|a,b,c| (a.to_i + b.to_i) * c.to_i });
str.gsub!(regex[9], {|a,b| (a.to_i * b.to_i) });
str.gsub!(/\b(\d\d) (\d) 100\b/, {|a,b| (a.to_i + b.to_i) * 100});
str.gsub!(/\b(\d{1,2}) 100\b/, {|a| (a.to_i * 100) });
str.gsub!(/\b(\d{2}) (\d{2})\b/, {|a,b| (a.to_i * 100) + b.to_i});
str.gsub!(regex[10], {|a| a.split(' ').map{.to_i}.sum });
}
```

Usage:

```
ARGF.each { |line|
say "#{line.chomp.dump} --> #{names_to_number(line).dump}";
}
```

Sample:

$ sidef names2nums.sf input.txt "Seventy two dollars" --> "72 dollars" "One Hundred and One Dalmatians" --> "101 dalmatians" "Two Thousand and One: A Space Odyssey" --> "2001 : a space odyssey" "Twenty Thirteen" --> "2013" "Nineteen Eighty-Four" --> "1984" "one thousand, five hundred and one" --> "1501" "three hundred and ten" --> "310" "ninety-nine" --> "99" "ninety nine thousand nine hundred ninety nine" --> "99999" "five hundred and twelve thousand, six hundred and nine" --> "512609" "two billion, one hundred" --> "2000000100"

## Tcl

```
package require Tcl 8.6
proc name2num name {
set words [regexp -all -inline {[a-z]+} [string tolower $name]]
set tokens {
"zero" 0 "one" 1 "two" 2 "three" 3 "four" 4 "five" 5 "six" 6 "seven" 7
"eight" 8 "nine" 9 "ten" 10 "eleven" 11 "twelve" 12 "thirteen" 13
"fourteen" 14 "fifteen" 15 "sixteen" 16 "seventeen" 17 "eighteen" 18
"nineteen" 19 "twenty" 20 "thirty" 30 "forty" 40 "fifty" 50 "sixty" 60
"seventy" 70 "eighty" 80 "ninety" 90 "hundred" 100 "thousand" 1000
"million" 1000000 "billion" 1000000000 "trillion" 1000000000000
"quadrillion" 1000000000000000 "qintillion" 1000000000000000000
}
set values {}
set groups {}
set previous -inf
set sign 1
foreach word $words {
if {[dict exists $tokens $word]} {
set value [dict get $tokens $word]
if {$value < $previous} {
# Check if we have to propagate backwards the "large" terms
if {[set mult [lindex $values end]] > 99} {
for {set i [llength $groups]} {[incr i -1] >= 0} {} {
if {[lindex $groups $i end] >= $mult} {
break
}
lset groups $i end+1 $mult
}
}
lappend groups $values
set values {}
} elseif {$value < 100 && $previous < 100 && $previous >= 0} {
# Special case: dates
lappend groups [lappend values 100]
set values {}
}
lappend values $value
set previous $value
} elseif {$word eq "minus"} {
set sign -1
}
}
lappend groups $values
set groups [lmap prodgroup $groups {tcl::mathop::* {*}$prodgroup}]
# Special case: dates
if {[llength $groups] == 2} {
if {[lmap g $groups {expr {$g < 100 && $g >= 10}}] eq {1 1}} {
lset groups 0 [expr {[lindex $groups 0] * 100}]
}
}
return [expr {$sign * [tcl::mathop::+ {*}$groups]}]
}
```

Demonstrating/testing (based on Perl code's samples):

```
set samples {
"Seventy-two dollars"
"Seventy two dollars"
"One Hundred and One Dalmatians"
"A Hundred and One Dalmatians"
"One Hundred One Dalmatians"
"Hundred and One Dalmatians"
"One Thousand and One Nights"
"Two Thousand and One: A Space Odyssey"
"Twenty Thirteen"
"Nineteen Eighty-Four"
"four billion, two hundred ninety-four million, nine hundred sixty-seven thousand, two hundred ninety five"
"Nine quadrillion, seven trillion, one hundred ninety-nine billion, two hundred fifty-four million, seven hundred forty thousand, nine hundred ninety two"
"Nine Hundred Ninety-Nine"
"One Thousand One Hundred Eleven"
"Eleven Hundred Eleven"
"Eight Thousand Eight Hundred Eighty-Eight"
"Eighty-Eight Hundred Eighty-Eight"
"Seven Million Seven Hundred Seventy-Seven Thousand Seven Hundred Seventy-Seven"
"Ninety-Nine Trillion Nine Hundred Ninety-Nine Billion Nine Hundred Ninety-Nine Million Nine Hundred Ninety-Nine Thousand Nine Hundred Ninety-Nine"
"ninety-nine"
"three hundred"
"three hundred and ten"
"one thousand, five hundred and one"
"twelve thousand, six hundred and nine"
"five hundred and twelve thousand, six hundred and nine"
"forty-three million, one hundred and twelve thousand, six hundred and nine"
"two billion, one hundred"
"zero"
"eight"
"one hundred"
"one hundred twenty three"
"one thousand one"
"ninety nine thousand nine hundred ninety nine"
"one hundred thousand"
"nine billion one hundred twenty three million four hundred fifty six thousand seven hundred eighty nine"
"one hundred eleven billion one hundred eleven"
"minus fifty six"
}
foreach s $samples {
puts "$s => [name2num $s]"
}
```

- Output:

Seventy-two dollars => 72 Seventy two dollars => 72 One Hundred and One Dalmatians => 101 A Hundred and One Dalmatians => 101 One Hundred One Dalmatians => 101 Hundred and One Dalmatians => 101 One Thousand and One Nights => 1001 Two Thousand and One: A Space Odyssey => 2001 Twenty Thirteen => 2013 Nineteen Eighty-Four => 1984 four billion, two hundred ninety-four million, nine hundred sixty-seven thousand, two hundred ninety five => 4294967295 Nine quadrillion, seven trillion, one hundred ninety-nine billion, two hundred fifty-four million, seven hundred forty thousand, nine hundred ninety two => 9007199254740992 Nine Hundred Ninety-Nine => 999 One Thousand One Hundred Eleven => 1111 Eleven Hundred Eleven => 1111 Eight Thousand Eight Hundred Eighty-Eight => 8888 Eighty-Eight Hundred Eighty-Eight => 8888 Seven Million Seven Hundred Seventy-Seven Thousand Seven Hundred Seventy-Seven => 7777777 Ninety-Nine Trillion Nine Hundred Ninety-Nine Billion Nine Hundred Ninety-Nine Million Nine Hundred Ninety-Nine Thousand Nine Hundred Ninety-Nine => 99999999999999 ninety-nine => 99 three hundred => 300 three hundred and ten => 310 one thousand, five hundred and one => 1501 twelve thousand, six hundred and nine => 12609 five hundred and twelve thousand, six hundred and nine => 512609 forty-three million, one hundred and twelve thousand, six hundred and nine => 43112609 two billion, one hundred => 2000000100 zero => 0 eight => 8 one hundred => 100 one hundred twenty three => 123 one thousand one => 1001 ninety nine thousand nine hundred ninety nine => 99999 one hundred thousand => 100000 nine billion one hundred twenty three million four hundred fifty six thousand seven hundred eighty nine => 9123456789 one hundred eleven billion one hundred eleven => 111000000111 minus fifty six => -56

## Wren

Wren's built in Num type can only deal accurately with integers up to 16 digits long (plus or minus 2 ^ 53) so without resorting to BigInt (which would be overkill here) we can only deal with numbers up to nine quadrillion or so.

```
import "./str" for Str
import "./pattern" for Pattern
import "./fmt" for Fmt
var names = {
"one": 1,
"two": 2,
"three": 3,
"four": 4,
"five": 5,
"six": 6,
"seven": 7,
"eight": 8,
"nine": 9,
"ten": 10,
"eleven": 11,
"twelve": 12,
"thirteen": 13,
"fourteen": 14,
"fifteen": 15,
"sixteen": 16,
"seventeen": 17,
"eighteen": 18,
"nineteen": 19,
"twenty": 20,
"thirty": 30,
"forty": 40,
"fifty": 50,
"sixty": 60,
"seventy": 70,
"eighty": 80,
"ninety": 90,
"hundred": 100,
"thousand": 1e3,
"million": 1e6,
"billion": 1e9,
"trillion": 1e12,
"quadrillion": 1e15
}
var zeros = ["zero", "nought", "nil", "none", "nothing"]
var seps = Pattern.new("[,|-| and | ]")
var nameToNum = Fn.new { |name|
var text = Str.lower(name.trim())
var isNegative = text.startsWith("minus ")
if (isNegative) text = text[6..-1]
if (text.startsWith("a ")) text = "one" + text[1..-1]
var words = seps.splitAll(text).where { |w| w != "" }.toList
var size = words.count
if (size == 1 && zeros.contains(words[0])) return 0
var multiplier = 1
var lastNum = 0
var sum = 0
for (i in size-1..0) {
var num = names[words[i]]
if (!num) Fiber.abort("'%(words[i])' is not a valid number")
if (num == lastNum) Fiber.abort("'%(name)' is not a well formed numeric string")
if (num >= 1000) {
if (lastNum >= 100) {
Fiber.abort("'%(name)' is not a well formed numeric string")
}
multiplier = num
if (i == 0) sum = sum + multiplier
} else if (num >= 100) {
multiplier = multiplier * 100
if (i == 0) sum = sum + multiplier
} else if (num >= 20) {
if (lastNum >= 10 && lastNum <= 90) {
Fiber.abort("'%(name)' is not a well formed numeric string")
}
sum = sum + num*multiplier
} else {
if (lastNum >= 1 && lastNum <= 90) {
Fiber.abort("'%(name)' is not a well formed numeric string")
}
sum = sum + num*multiplier
}
lastNum = num
}
return (isNegative) ? -sum : sum
}
var tests = [
"none",
"one",
"twenty-five",
"minus one hundred and seventeen",
"hundred and fifty-six",
"minus two thousand two",
"nine thousand, seven hundred, one",
"minus six hundred and twenty six thousand, eight hundred and fourteen",
"four million, seven hundred thousand, three hundred and eighty-six",
"fifty-one billion, two hundred and fifty-two million, seventeen thousand, one hundred eighty-four",
"two hundred and one billion, twenty-one million, two thousand and one",
"minus three hundred trillion, nine million, four hundred and one thousand and thirty-one",
"one quadrillion and one",
"minus nine quadrillion, one hundred thirty-seven"
]
for (name in tests) Fmt.print("$17d = $s", nameToNum.call(name), name)
```

- Output:

0 = none 1 = one 25 = twenty-five -117 = minus one hundred and seventeen 156 = hundred and fifty-six -2002 = minus two thousand two 9701 = nine thousand, seven hundred, one -626814 = minus six hundred and twenty six thousand, eight hundred and fourteen 4700386 = four million, seven hundred thousand, three hundred and eighty-six 51252017184 = fifty-one billion, two hundred and fifty-two million, seventeen thousand, one hundred eighty-four 201021002001 = two hundred and one billion, twenty-one million, two thousand and one -300000009401031 = minus three hundred trillion, nine million, four hundred and one thousand and thirty-one 1000000000000001 = one quadrillion and one -9000000000000137 = minus nine quadrillion, one hundred thirty-seven

## zkl

```
var names=T("zero","one","two","three","four","five","six","seven","eight",
"nine","ten","eleven","twelve","thirteen","fourteen","fifteen",
"sixteen","seventeen","eighteen","nineteen","twenty",
"thirty","forty","fifty","sixty","seventy","eighty","ninety",
"hundred","thousand","million","billion", "trillion")
.zip([0..20].chain([30..90,10]).walk().append(
100,1000,1000000,1000000000,1000000000000))
.toDictionary();
fcn stringToNumber(s){
s=s.toLower().replace(",","").replace(" and "," ").replace("-"," ");
words,minus,total,hund,prev := s.split(), 1,0,0,0;
if(not words) return(0);
if(words[0]=="minus"){ minus=-1; words=words[1,*]; }
foreach w in (words){
n:=names.find(w);
if(Void==n) throw(Exception.ValueError("I don't know "+w));
if(n<100){
dn,dp := n.numDigits,prev.numDigits; // 0,1,2 and 0,1,2,3,...
if(dp<3)
if((dn==dp==1) or dn==0 or dp==0) hund*=10;
else if(dn==2) hund*=100;
hund+=n;
}
else if(n==100) hund*=n;
else{ total+=hund*n; hund=0; }
prev=n;
}
minus*(total + hund)
}
```

```
foreach s in (T("eighty-five thousand and one ",
" one hundred and fifty-five thousand and nineteen",
"one thousand, nine hundred and eighty-four","Nineteen Eighty-Four",
"six thousand Nineteen Eighty-Four",
"","zero","zero zero one","one zero","one zero two","one one three",
"ninety one","one ninety","ninety ninety",
"minus four million, five hundred and forty-seven thousand",
"six million, seven hundred and sixty-six thousand and twenty-seven")){
println("\"%s\" is %,d".fmt(s,stringToNumber(s)));
}
```

- Output:

"eighty-five thousand and one " is 85,001 " one hundred and fifty-five thousand and nineteen" is 155,019 "one thousand, nine hundred and eighty-four" is 1,984 "Nineteen Eighty-Four" is 1,984 "six thousand Nineteen Eighty-Four" is 7,984 "" is 0 "zero" is 0 "zero zero one" is 1 "one zero" is 10 "one zero two" is 102 "one one three" is 113 "ninety one" is 91 "one ninety" is 190 "ninety ninety" is 9,090 "minus four million, five hundred and forty-seven thousand" is -4,547,000 "six million, seven hundred and sixty-six thousand and twenty-seven" is 6,766,027