View source for Determine sentence type

{{task|Text processing}}
[[Category:Recursion]] 
[[Category:String manipulation]]

Use these sentences: 
"hi there, how are you today? I'd like to present to you the washing machine 9001. You have been nominated to win one of these! Just make sure you don't break it."

;Task
: Search for the last used punctuation in a sentence, and determine its type according to its punctuation.

; Output one of these letters: "E" (Exclamation!), "Q" (Question?), "S" (Serious.), "N" (Neutral). 

;Extra
:  Make your code able to determine multiple sentences.


Don't leave any errors!


{{Template:Strings}}
<br><br>

=={{header|11l}}==
{{trans|Go}}

<syntaxhighlight lang="11l">F sentenceType(s)
   I s.empty
      R ‘’

   [Char] types
   L(c) s
      I c == ‘?’
         types.append(Char(‘Q’))
      E I c == ‘!’
         types.append(Char(‘E’))
      E I c == ‘.’
         types.append(Char(‘S’))

   I s.last !C ‘?!.’
      types.append(Char(‘N’))

   R types.join(‘|’)

V s = ‘hi there, how are you today? I'd like to present to you the washing machine 9001. You have been nominated to win one of these! Just make sure you don't break it’
print(sentenceType(s))</syntaxhighlight>

{{out}}
<pre>
Q|S|E|N
</pre>

=={{header|ALGOL 68}}==
Classifies an empty string as "".
<syntaxhighlight lang="algol68">BEGIN # determuine the type of a sentence by looking at the final punctuation  #
    CHAR exclamation = "E"; # classification codes... #
    CHAR question    = "Q";
    CHAR serious     = "S";
    CHAR neutral     = "N";
    # returns the type(s) of the sentence(s) in s - exclamation, question,     #
    #                     serious or neutral; if there are multiple sentences  #
    #                     the types are separated by |                         #
    PROC classify = ( STRING s )STRING:
         BEGIN
            STRING result := "";
            BOOL pending neutral := FALSE; 
            FOR s pos FROM LWB s TO UPB s DO
                IF   pending neutral := FALSE;
                     CHAR c = s[ s pos ];
                     c = "?"
                THEN result +:= question    + "|"
                ELIF c = "!"
                THEN result +:= exclamation + "|"
                ELIF c = "."
                THEN result +:= serious     + "|"
                ELSE pending neutral := TRUE
                FI
            OD;
            IF   pending neutral
            THEN result +:= neutral + "|"
            FI;
            # if s was empty, then return an empty string, otherwise remove the final separator #
            IF result = "" THEN "" ELSE result[ LWB result : UPB result - 1 ] FI
         END # classify # ;
    # task test case #
    print( ( classify( "hi there, how are you today? I'd like to present to you the washing machine 9001. "
                     + "You have been nominated to win one of these! Just make sure you don't break it"
                     )
           , newline
           )
         )
END</syntaxhighlight>
{{out}}
<pre>
Q|S|E|N
</pre>

=={{header|AutoHotkey}}==
<syntaxhighlight lang="autohotkey">Sentence := "hi there, how are you today? I'd like to present to you the washing machine 9001. You have been nominated to win one of these! Just make sure you don't break it"
Msgbox, % SentenceType(Sentence)

SentenceType(Sentence) {
	Sentence := Trim(Sentence)
	Loop, Parse, Sentence, .?!
	{
		N := (!E && !Q && !S)
		, S := (InStr(SubStr(Sentence, InStr(Sentence, A_LoopField)+StrLen(A_LoopField), 3), "."))
		, Q := (InStr(SubStr(Sentence, InStr(Sentence, A_LoopField)+StrLen(A_LoopField), 3), "?"))
		, E := (InStr(SubStr(Sentence, InStr(Sentence, A_LoopField)+StrLen(A_LoopField), 3), "!"))
		, type .= (E) ? ("E|") : ((Q) ? ("Q|") : ((S) ? ("S|") : "N|"))
		, D := SubStr(Sentence, InStr(Sentence, A_LoopField)+StrLen(A_LoopField), 3)
	}
	return (D = SubStr(Sentence, 1, 3)) ? RTrim(RTrim(type, "|"), "N|") : RTrim(type, "|")
}</syntaxhighlight>

{{out}}
<pre>Q|S|E|N</pre>
=={{header|AWK}}==
<syntaxhighlight lang="awk">
# syntax: GAWK -f DETERMINE_SENTENCE_TYPE.AWK
BEGIN {
    str = "hi there, how are you today? I'd like to present to you the washing machine 9001. You have been nominated to win one of these! Just make sure you don't break it"
    main(str)
    main("Exclamation! Question? Serious. Neutral")
    exit(0)
}
function main(str,  c) {
    while (length(str) > 0) {
      c = substr(str,1,1)
      sentence = sentence c
      if (c == "!") {
        prn("E")
      }
      else if (c == ".") {
        prn("S")
      }
      else if (c == "?") {
        prn("Q")
      }
      str = substr(str,2)
    }
    prn("N")
    print("")
}
function prn(type) {
    gsub(/^ +/,"",sentence)
    printf("%s %s\n",type,sentence)
    sentence = ""
}
</syntaxhighlight>
{{out}}
<pre>
Q hi there, how are you today?
S I'd like to present to you the washing machine 9001.
E You have been nominated to win one of these!
N Just make sure you don't break it

E Exclamation!
Q Question?
S Serious.
N Neutral
</pre>

=={{header|Bruijn}}==
<syntaxhighlight lang="bruijn">
:import std/List .
:import std/Char .

determine [∅?0 '?' ([(0 =? '?' 'Q' (0 =? '.' 'S' (0 =? '!' 'E' 'N')))] _0)]

:test (determine empty) ('?')
:test (determine "hi there, how are you today?") ('Q')
:test (determine "I'd like to present to you the washing machine 9001.") ('S')
:test (determine "You have been nominated to win one of these!") ('E')
:test (determine "Just make sure you don't break it") ('N')
</syntaxhighlight>

=={{header|C++}}==
<syntaxhighlight lang="c++">

#include <exception>
#include <iostream>
#include <string>
#include <vector>

char sentence_type(const std::string& sentence) {
	if ( sentence.empty() ) {
		throw std::invalid_argument("Cannot classify an empty sentence");
	}

	char result;
	const char last_character = sentence.back();
	switch (last_character) {
		case '?': result = 'Q'; break;
		case '.': result = 'S'; break;
		case '!': result = 'E'; break;
		default:  result = 'N'; break;
	};
	return result;
}

int main() {
	const std::vector<std::string> sentences = { "hi there, how are you today?",
									  	  	     "I'd like to present to you the washing machine 9001.",
												 "You have been nominated to win one of these!",
												 "Just make sure you don't break it" };

	for ( const std::string& sentence : sentences ) {
		std::cout << sentence << " -> " << sentence_type(sentence) << std::endl;
	}
}
</syntaxhighlight>
<pre>
hi there, how are you today? -> Q
I'd like to present to you the washing machine 9001. -> S
You have been nominated to win one of these! -> E
Just make sure you don't break it -> N
</pre>

=={{header|CLU}}==
<syntaxhighlight lang="clu">% This iterator takes a string and yields one of 'E', 'Q',
% 'S' or 'N' for every sentence found.
% Because sentences are separated by punctuation, only the
% last one can be 'N'.

sentence_types = iter (s: string) yields (char)
    own punct: string := "!?."  % relevant character classes
    own space: string := " \t\n"
    own types: string := "EQS"  % sentence type characters
    
    prev_punct: bool := false   % whether the previous character was punctuation
    last_punct: int := 0        % index of last punctuation character encountered
    sentence: bool := true      % whether there are words since the last punctuation
    
    for c: char in string$chars(s) do
        pu: int := string$indexc(c, punct)
        sp: int := string$indexc(c, space)
        if pu ~= 0 then
            prev_punct := true
            last_punct := pu 
        elseif sp ~= 0 then
            if prev_punct then
                % a space after punctuation means a sentence has ended here
                yield(types[last_punct])
                sentence := false
            end
            prev_punct := false
            sentence := false
        else
            sentence := true
        end
    end
    
    % handle the last sentence
    if prev_punct then yield(types[last_punct])
    elseif sentence then yield('N')
    end
end sentence_types

% Test
start_up = proc ()
    po: stream := stream$primary_output()
    test: string := 
        "hi there, how are you today? I'd like to " ||
        "present to you the washing machine 9001. You " ||
        "have been nominated to win one of these! Just " ||
        "make sure you don't break it" 

    % print the type of each sentence
    for c: char in sentence_types(test) do  
        stream$putc(po, c)
    end
end start_up </syntaxhighlight>
{{out}}
<pre>QSEN</pre>


=={{header|Delphi}}==
{{works with|Delphi|6.0}}
{{libheader|SysUtils,StdCtrls}}


<syntaxhighlight lang="Delphi">
const TestStrings = 'hi there, how are you today? I''''d like to present to you the washing machine 9001. You have been nominated to win one of these! Just make sure you don''''t break it';

procedure AnalyzeSentenceType(Memo: TMemo; S: string);
{Extract sentences from string and analyze terminating punctuation}
var I: integer;
var Sent,SType: string;
begin
Sent:='';
for I:=1 to Length(S) do
	begin
	Sent:=Sent+S[I];
	{Look terminating char or condition}
	if (S[I] in ['?','!','.']) or (I>=Length(S)) then
		begin
		{If found, determine sentence type}
		case Sent[Length(Sent)] of
		 '?': SType:=' (Q)';
		 '!': SType:=' (E)';
		 '.': SType:=' (S)';
		 else SType:=' (N)';
		end;
		{Display it}
		Memo.Lines.Add(Trim(Sent)+SType);
		Sent:='';
		end;
	end;
end;


procedure TestSentenceTypes(Memo: TMemo);
{Analyze some test sentences}
begin
AnalyzeSentenceType(Memo, TestStrings);
end;

</syntaxhighlight>
{{out}}
<pre>
hi there, how are you today? (Q)
I''d like to present to you the washing machine 9001. (S)
You have been nominated to win one of these! (E)
Just make sure you don''t break it (N)
</pre>

=={{header|EasyLang}}==
<syntaxhighlight>
func$ stype s$ .
   h$ = substr s$ len s$ 1
   ind = strpos "?!." h$ mod1 4
   return substr "QESN" ind 1
.
txt$[] = [ "hi there, how are you today?" "I'd like to present to you the washing machine 9001." "You have been nominated to win one of these!" "Just make sure you don't break it" ]
for t$ in txt$[]
   print t$ & " -> " & stype t$
.
</syntaxhighlight>
{{out}}
<pre>
hi there, how are you today? -> Q
I'd like to present to you the washing machine 9001. -> S
You have been nominated to win one of these! -> E
Just make sure you don't break it -> N
</pre>

=={{header|Epoxy}}==
<syntaxhighlight lang="epoxy">const SentenceTypes: {
	["?"]:"Q",
	["."]:"S",
	["!"]:"E"
}

fn DetermineSentenceType(Char)
	return SentenceTypes[Char]||"N"
cls

fn GetSentences(Text)
	var Sentences: [],
		Index: 0,
		Length: #Text
	loop i:0;i<Length;i+:1 do
		var Char: string.subs(Text,i,1)
		var Type: DetermineSentenceType(Char)
		if Type != "N" || i==Length-1 then
			log(string.sub(Text,Index,i+1)+" ("+Type+")")
			Index:i+2;
		cls
	cls
cls

GetSentences("hi there, how are you today? I'd like to present to you the washing machine 9001. You have been nominated to win one of these! Just make sure you don't break it")</syntaxhighlight>
{{out}}
<pre>
hi there, how are you today? (Q)
I'd like to present to you the washing machine 9001. (S)
You have been nominated to win one of these! (E)
Just make sure you don't break it (N)
</pre>

=={{header|Factor}}==
This program attempts to prevent common abbreviations from ending sentences early. It also tries to handle parenthesized sentences and implements an additional type for exclamatory questions (EQ).
{{works with|Factor|0.99 2021-06-02}}
<syntaxhighlight lang="factor">USING: combinators io kernel regexp sequences sets splitting
wrap.strings ;

! courtesy of https://www.infoplease.com/common-abbreviations

CONSTANT: common-abbreviations {
    "A.B." "abbr." "Acad." "A.D." "alt." "A.M." "Assn."
    "at. no." "at. wt." "Aug." "Ave." "b." "B.A." "B.C." "b.p."
    "B.S." "c." "Capt." "cent." "co." "Col." "Comdr." "Corp."
    "Cpl." "d." "D.C." "Dec." "dept." "dist." "div." "Dr." "ed."
    "est." "et al." "Feb." "fl." "gal." "Gen." "Gov." "grad."
    "Hon." "i.e." "in." "inc." "Inst." "Jan." "Jr." "lat."
    "Lib." "long." "Lt." "Ltd." "M.D." "Mr." "Mrs." "mt." "mts."
    "Mus." "no." "Nov." "Oct." "Op." "pl." "pop." "pseud." "pt."
    "pub." "Rev." "rev." "R.N." "Sept." "Ser." "Sgt." "Sr."
    "St." "uninc." "Univ." "U.S." "vol." "vs." "wt."
}

: sentence-enders ( str -- newstr )
    R/ \)/ "" re-replace
    " " split harvest
    unclip-last swap
    [ common-abbreviations member? ] reject
    [ last ".!?" member? ] filter
    swap suffix ;

: serious? ( str -- ? ) last CHAR: . = ;
: neutral? ( str -- ? ) last ".!?" member? not ;
: mixed? ( str -- ? ) "?!" intersect length 2 = ;
: exclamation? ( str -- ? ) last CHAR: ! = ;
: question? ( str -- ? ) last CHAR: ? = ;

: type ( str -- newstr )
    {
        { [ dup serious? ] [ drop "S" ] }
        { [ dup neutral? ] [ drop "N" ] }
        { [ dup mixed? ] [ drop "EQ" ] }
        { [ dup exclamation? ] [ drop "E" ] }
        { [ dup question? ] [ drop "Q" ] }
        [ drop "UNKNOWN" ]
    } cond ;

: sentences ( str -- newstr )
    sentence-enders [ type ] map "|" join ;

: show ( str -- )
    dup sentences " -> " glue 60 wrap-string print ;

"Hi there, how are you today? I'd like to present to you the washing machine 9001. You have been nominated to win one of these! Just make sure you don't break it" show
nl
"(There was nary a mouse stirring.) But the cats were going
bonkers!" show
nl
"\"Why is the car so slow?\" she said." show
nl
"Hello, Mr. Anderson!" show
nl
"Are you sure?!?! How can you know?" show</syntaxhighlight>
{{out}}
<pre>
Hi there, how are you today? I'd like to present to you the
washing machine 9001. You have been nominated to win one of
these! Just make sure you don't break it -> Q|S|E|N

(There was nary a mouse stirring.) But the cats were going
bonkers! -> S|E

"Why is the car so slow?" she said. -> S

Hello, Mr. Anderson! -> E

Are you sure?!?! How can you know? -> EQ|Q
</pre>

=={{header|FreeBASIC}}==
<syntaxhighlight lang="freebasic">function sentype( byref s as string ) as string
    'determines the sentence type of the first sentence in the string
    'returns "E" for an exclamation, "Q" for a question, "S" for serious
    'and "N" for neutral.
    'modifies the string to remove the first sentence
    for i as uinteger = 1 to len(s)
        if mid(s, i, 1) = "!" then
            s=right(s,len(s)-i)
            return "E"
        end if
        if mid(s, i, 1) = "." then
            s=right(s,len(s)-i)
            return "S"
        end if 
        if mid(s, i, 1) = "?" then
            s=right(s,len(s)-i)
            return "Q"
        end if 
    next i
    'if we get to the end without encountering punctuation, this
    'must be a neutral sentence, which can only happen as the last one
    s=""
    return "N"
end function

dim as string spam = "hi there, how are you today? I'd like to present to you the washing machine 9001. You have been nominated to win one of these! Just make sure you don't break it"

while len(spam)>0
    print sentype(spam)
wend</syntaxhighlight>
{{out}}<pre>Q
S
E
N
</pre>

=={{header|Go}}==
{{trans|Wren}}
<syntaxhighlight lang="go">package main

import (
    "fmt"
    "strings"
)

func sentenceType(s string) string {
    if len(s) == 0 {
        return ""
    }
    var types []string
    for _, c := range s {
        if c == '?' {
            types = append(types, "Q")
        } else if c == '!' {
            types = append(types, "E")
        } else if c == '.' {
            types = append(types, "S")
        }
    }
    if strings.IndexByte("?!.", s[len(s)-1]) == -1 {
        types = append(types, "N")
    }
    return strings.Join(types, "|")
}

func main() {
    s := "hi there, how are you today? I'd like to present to you the washing machine 9001. You have been nominated to win one of these! Just make sure you don't break it"
    fmt.Println(sentenceType(s))
}</syntaxhighlight>

{{out}}
<pre>
Q|S|E|N
</pre>

=={{header|Java}}==
<syntaxhighlight lang="java">

import java.util.List;

public final class DetermineSentenceType {

	public static void main(String[] aArgs) {
		List<String> sentences = List.of( "hi there, how are you today?",
										  "I'd like to present to you the washing machine 9001.",
										  "You have been nominated to win one of these!",
										  "Just make sure you don't break it" );

		for ( String sentence : sentences ) {
			System.out.println(sentence + " -> " + sentenceType(sentence));
		}
	}
	
	private static char sentenceType(String aSentence) {
		if ( aSentence.isEmpty() ) {
			throw new IllegalArgumentException("Cannot classify an empty sentence");
		}
		
		final char lastCharacter = aSentence.charAt(aSentence.length() - 1);
		return switch (lastCharacter) {
			case '?' -> 'Q';
			case '.' -> 'S';
			case '!' -> 'E';
			default  -> 'N';
		};		
	}	
	
}
</syntaxhighlight>
{{ out }}
<pre>
hi there, how are you today? -> Q
I'd like to present to you the washing machine 9001. -> S
You have been nominated to win one of these! -> E
Just make sure you don't break it -> N
</pre>

=={{header|jq}}==
{{works with|jq}}
'''Works with gojq, the Go implementation of jq'''

The following parses sentences with embedded quotations naively,
so that for example the sentence "He asked 'How are you?'." results in: Q S
<syntaxhighlight lang="jq">
# Input: a string
# Output: a stream of sentence type indicators
def sentenceTypes:
  def trim: sub("^ +";"") | sub(" +$";"");
  def parse:
    capture("(?<s>[^?!.]*)(?<p>[?!.])(?<remainder>.*)" )
    // {p:"", remainder:""};
  def encode:
    if   . == "?" then "Q"
    elif . == "!" then "E"
    elif . == "." then "S"
    else "N"
    end;
  trim
  | select(length>0)
  | parse
  | (.p | encode), (.remainder | sentenceTypes);

def s: "hi there, how are you today? I'd like to present to you the washing machine 9001. You have been nominated to win one of these! Just make sure you don't break it";

s | sentenceTypes</syntaxhighlight>
{{out}}
<pre>
Q
S
E
N
</pre>

=={{header|Julia}}==
<syntaxhighlight lang="julia">const text = """
Hi there, how are you today? I'd like to present to you the washing machine 9001.
You have been nominated to win one of these! Just make sure you don't break it"""

haspunctotype(s) = '.' in s ? "S" : '!' in s ? "E" : '?' in s ? "Q" : "N"

text = replace(text, "\n" => " ")
parsed = strip.(split(text, r"(?:(?:(?<=[\?\!\.])(?:))|(?:(?:)(?=[\?\!\.])))"))
isodd(length(parsed)) && push!(parsed, "")  # if ends without pnctuation
for i in 1:2:length(parsed)-1
    println(rpad(parsed[i] * parsed[i + 1], 52),  " ==> ", haspunctotype(parsed[i + 1]))
end
</syntaxhighlight>{{out}}
<pre>
Hi there, how are you today?                         ==> Q
I'd like to present to you the washing machine 9001. ==> S
You have been nominated to win one of these!         ==> E
Just make sure you don't break it                    ==> N
</pre>

=={{header|Lua}}==
<syntaxhighlight lang="lua">text = "hi there, how are you today? I'd like to present to you the washing machine 9001. You have been nominated to win one of these! Just make sure you don't break it"
p2t = { [""]="N", ["."]="S", ["!"]="E", ["?"]="Q" }
for s, p in text:gmatch("%s*([^%!%?%.]+)([%!%?%.]?)") do
  print(s..p..":  "..p2t[p])
end</syntaxhighlight>
{{out}}
<pre>hi there, how are you today?:  Q
I'd like to present to you the washing machine 9001.:  S
You have been nominated to win one of these!:  E
Just make sure you don't break it:  N</pre>

=={{header|Nim}}==
<syntaxhighlight lang="Nim">type SentenceType {.pure.} = enum Q, E, S, N

func sentenceType(s: string): SentenceType =
  ## Return the type of a sentence.
  if s.len == 0: return
  result = case s[^1]
           of '?': Q
           of '!': E
           of '.': S
           else: N

iterator sentences(text: string): string =
  ## Cut a text into sentences.
  var sentence = ""
  for ch in text:
    if ch == ' ' and sentence.len == 0: continue
    sentence.add ch
    if ch in "?!.":
      yield sentence
      sentence.reset()
  if sentence.len > 0:
    yield sentence


const Text = "hi there, how are you today? " &
             "I'd like to present to you the washing machine 9001. " &
             "You have been nominated to win one of these!" &
             "Just make sure you don't break it"

for sentence in Text.sentences():
  echo sentence, " → ", sentenceType(sentence)
</syntaxhighlight>

{{out}}
<pre>hi there, how are you today? → Q
I'd like to present to you the washing machine 9001. → S
You have been nominated to win one of these! → E
Just make sure you don't break it → N
</pre>

=={{header|Perl}}==
<syntaxhighlight lang="perl">use strict;
use warnings;
use feature 'say';
use Lingua::Sentence;

my $para1 = <<'EOP';
hi there, how are you today? I'd like to present to you the washing machine
9001. You have been nominated to win one of these! Just make sure you don't
break it
EOP

my $para2 = <<'EOP';
Just because there are punctuation characters like "?", "!" or especially "."
present, it doesn't necessarily mean you have reached the end of a sentence,
does it Mr. Magoo? The syntax highlighting here for Perl isn't bad at all.
EOP

my $splitter = Lingua::Sentence->new("en");
for my $text ($para1, $para2) {
  for my $s (split /\n/, $splitter->split( $text =~ s/\n//gr ) {
    print "$s| ";
    if    ($s =~ /!$/)  { say 'E' }
    elsif ($s =~ /\?$/) { say 'Q' }
    elsif ($s =~ /\.$/) { say 'S' }
    else                { say 'N' }
  }
}</syntaxhighlight>
{{out}}
<pre>hi there, how are you today?| Q
I'd like to present to you the washing machine 9001.| S
You have been nominated to win one of these!| E
Just make sure you don't break it.| N
Just because there are punctuation characters like "?", "!" or especially "." present, it doesn't necessarily mean you have reached the end of a sentence, does it Mr. Magoo?| Q
The syntax highlighting here for Perl isn't bad at all.| S</pre>

=={{header|Phix}}==
<!--<syntaxhighlight lang="phix">(phixonline)-->
 <span style="color: #008080;">with</span> <span style="color: #008080;">javascript_semantics</span>
 <span style="color: #008080;">constant</span> <span style="color: #000000;">s</span> <span style="color: #0000FF;">=</span> <span style="color: #008000;">`hi there, how are you today? I'd like to present 
 to you the washing machine 9001. You have been nominated to win 
 one of these! Just make sure you don't break it`</span>
 <span style="color: #004080;">sequence</span> <span style="color: #000000;">t</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">split_any</span><span style="color: #0000FF;">(</span><span style="color: #7060A8;">trim</span><span style="color: #0000FF;">(</span><span style="color: #000000;">s</span><span style="color: #0000FF;">),</span><span style="color: #008000;">"?!."</span><span style="color: #0000FF;">),</span>
          <span style="color: #000000;">u</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">substitute_all</span><span style="color: #0000FF;">(</span><span style="color: #000000;">s</span><span style="color: #0000FF;">,</span><span style="color: #000000;">t</span><span style="color: #0000FF;">,</span><span style="color: #7060A8;">repeat</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"|"</span><span style="color: #0000FF;">,</span><span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">t</span><span style="color: #0000FF;">))),</span>
          <span style="color: #000000;">v</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">substitute_all</span><span style="color: #0000FF;">(</span><span style="color: #000000;">u</span><span style="color: #0000FF;">,{</span><span style="color: #008000;">"|?"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"|!"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"|."</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"|"</span><span style="color: #0000FF;">},</span><span style="color: #008000;">"QESN"</span><span style="color: #0000FF;">),</span>
          <span style="color: #000000;">w</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">join</span><span style="color: #0000FF;">(</span><span style="color: #000000;">v</span><span style="color: #0000FF;">,</span><span style="color: #008000;">'|'</span><span style="color: #0000FF;">)</span>
 <span style="color: #0000FF;">?</span><span style="color: #000000;">w</span>
<!--</syntaxhighlight>-->
{{out}}
<pre>
"Q|S|E|N"
</pre>

=={{header|Python}}==
<syntaxhighlight lang="python">import re

txt = """
Hi there, how are you today? I'd like to present to you the washing machine 9001.
You have been nominated to win one of these! Just make sure you don't break it"""

def haspunctotype(s):
    return 'S' if '.' in s else 'E' if '!' in s else 'Q' if '?' in s else 'N'

txt = re.sub('\n', '', txt)
pars = [s.strip() for s in re.split("(?:(?:(?<=[\?\!\.])(?:))|(?:(?:)(?=[\?\!\.])))", txt)]
if len(pars) % 2:
    pars.append('')  # if ends without punctuation
for i in range(0, len(pars)-1, 2):
    print((pars[i] + pars[i + 1]).ljust(54), "==>", haspunctotype(pars[i + 1]))
</syntaxhighlight>{{out}}
<pre>
Hi there, how are you today?                           ==> Q
I'd like to present to you the washing machine 9001.   ==> S
You have been nominated to win one of these!           ==> E
Just make sure you don't break it                      ==> N
</pre>


Or for more generality, and an alternative to hand-crafted regular expressions:
<syntaxhighlight lang="python">'''Grouping and tagging by final character of string'''

from functools import reduce
from itertools import groupby


# tagGroups :: Dict -> [String] -> [(String, [String])]
def tagGroups(tagDict):
    '''A list of (Tag, SentenceList) tuples, derived
       from an input text and a supplied dictionary of
       tags for each of a set of final punctuation marks.
    '''
    def go(sentences):
        return [
            (tagDict.get(k, 'Not punctuated'), list(v))
            for (k, v) in groupby(
                sorted(sentences, key=last),
                key=last
            )
        ]
    return go


# sentenceSegments :: Chars -> String -> [String]
def sentenceSegments(punctuationChars):
    '''A list of sentences delimited by the supplied
       punctuation characters, where these are followed
       by spaces.
    '''
    def go(s):
        return [
            ''.join(cs).strip() for cs
            in splitBy(
                sentenceBreak(punctuationChars)
            )(s)
        ]
    return go


# sentenceBreak :: Chars -> (Char, Char) -> Bool
def sentenceBreak(finalPunctuation):
    '''True if the first of two characters is a final
       punctuation mark and the second is a space.
    '''
    def go(a, b):
        return a in finalPunctuation and " " == b
    return go


# ------------------------- TEST -------------------------
# main :: IO ()
def main():
    '''Join, segmentation, tags'''

    tags = {'!': 'E', '?': 'Q', '.': 'S'}

    # Joined by spaces,
    sample = ' '.join([
        "Hi there, how are you today?",
        "I'd like to present to you the washing machine 9001.",
        "You have been nominated to win one of these!",
        "Might it be possible to add some challenge to this task?",
        "Feels as light as polystyrene filler.",
        "But perhaps substance isn't the goal!",
        "Just make sure you don't break off before the"
    ])

    # segmented by punctuation,
    sentences = sentenceSegments(
        tags.keys()
    )(sample)

    # and grouped under tags.
    for kv in tagGroups(tags)(sentences):
        print(kv)


# ----------------------- GENERIC ------------------------

# last :: [a] -> a
def last(xs):
    '''The last element of a non-empty list.'''
    return xs[-1]


# splitBy :: (a -> a -> Bool) -> [a] -> [[a]]
def splitBy(p):
    '''A list split wherever two consecutive
       items match the binary predicate p.
    '''
    # step :: ([[a]], [a], a) -> a -> ([[a]], [a], a)
    def step(acp, x):
        acc, active, prev = acp

        return (acc + [active], [x], x) if p(prev, x) else (
            (acc, active + [x], x)
        )

    # go :: [a] -> [[a]]
    def go(xs):
        if 2 > len(xs):
            return xs
        else:
            h = xs[0]
            ys = reduce(step, xs[1:], ([], [h], h))
            # The accumulated sublists, and the final group.
            return ys[0] + [ys[1]]

    return go


# MAIN ---
if __name__ == '__main__':
    main()</syntaxhighlight>
{{Out}}
<pre>('E', ['You have been nominated to win one of these!', "But perhaps substance isn't the goal!"])
('S', ["I'd like to present to you the washing machine 9001.", 'Feels as light as polystyrene filler.'])
('Q', ['Hi there, how are you today?', 'Might it be possible to add some challenge to this task?'])
('Not punctuated', ["Just make sure you don't break off before the"])</pre>

=={{header|Racket}}==
<syntaxhighlight lang="racket">
#lang racket

(define input "hi there, how are you today? I'd like to present to you the washing machine 9001. You have been nominated to win one of these! Just make sure you don't break it")

(define sentence-types #hash((#\. . "S") (#\? . "Q") (#\! . "E")))
(define punctuation (hash-keys sentence-types))

(let ([characters (string->list input)])
  (for ([i characters])
    (when (member i punctuation)
      (printf "~a|" (hash-ref sentence-types i))))
  (unless (member (last characters) punctuation)
    (printf "N")))
</syntaxhighlight>
{{out}}
<pre>
Q|S|E|N
</pre>

=={{header|Raku}}==

<syntaxhighlight lang="raku" line>use Lingua::EN::Sentence;

my $paragraph = q:to/PARAGRAPH/;
hi there, how are you today? I'd like to present to you the washing machine
9001. You have been nominated to win one of these! Just make sure you don't
break it


Just because there are punctuation characters like "?", "!" or especially "."
present, it doesn't necessarily mean you have reached the end of a sentence,
does it Mr. Magoo? The syntax highlighting here for Raku isn't the best.
PARAGRAPH

say join "\n\n", $paragraph.&sentences.map: {
    /(<:punct>)$/;
    $_ ~ ' | ' ~ do
    given $0 {
        when '!' { 'E' };
        when '?' { 'Q' };
        when '.' { 'S' };
        default  { 'N' };
    }
}</syntaxhighlight>
{{out}}
<pre>hi there, how are you today? | Q

I'd like to present to you the washing machine
9001. | S

You have been nominated to win one of these! | E

Just make sure you don't
break it | N

Just because there are punctuation characters like "?", "!" or especially "."
present, it doesn't necessarily mean you have reached the end of a sentence,
does it Mr. Magoo? | Q

The syntax highlighting here for Raku isn't the best. | S</pre>

=={{header|Ring}}==
<syntaxhighlight lang="ring">
see "working..." + nl
sType = []
sent = "hi there, how are you today? I'd like to present to you the washing machine 9001. You have been nominated to win one of these! How do you like this washing machine? Buy it, don't hesitate! You will be satisfied with it. Just make sure you don't break it"

ind = 1
while true
      pos = substring(sent,"?",ind)
      if pos > 0
         add(sType,pos)
         ind = pos+1
      else
         exit
      ok
end

ind = 1
while true
      pos = substring(sent,"!",ind)
      if pos > 0
         add(sType,pos)
         ind = pos+1
      else
         exit
      ok
end

ind = 1
while true
      pos = substring(sent,".",ind)
      if pos > 0
         add(sType,pos)
         ind = pos+1
      else
         exit
      ok
end

if pos < len(sent)
   neut = "N"
else
   neut = ""
ok

sType = sort(sType)

text = ""
for n = 1 to len(sType)
    if sent[sType[n]] = "?"
       text = text + "Q" + "|"
    ok
    if sent[sType[n]] = "!"
       text = text + "E" + "|"
    ok
    if sent[sType[n]] = "."
       text = text + "S" + "|"
    ok
next
see text + neut  + nl
see "done..." + nl

func substring str,substr,n
	newstr=right(str,len(str)-n+1)
	nr = substr(newstr, substr)
	if nr = 0
		return 0
	else
		return n + nr -1
	ok
</syntaxhighlight>
{{out}}
<pre>
working...
Q|S|E|Q|E|S|N
done...
</pre>

=={{header|RPL}}==
{{works with|Halcyon Calc|4.2.8}}
 ≪ OVER SIZE → str seps len 
   ≪ 1 CF { 0 } 1 len FOR j 
      IF seps str j DUP SUB POS THEN 
         j + IF j len == THEN 1 SF END 
      END NEXT 
      IF 1 FC? THEN len + END 
      { } SWAP 1 OVER SIZE 1 - FOR j 
        str OVER j GETI 1 + ROT ROT 
        GET SUB ROT SWAP + SWAP 
      NEXT DROP 
 ≫ ≫ ''''PARSE'''' STO
 
 ≪ "?!." SWAP OVER '''PARSE''' "QES" → seps sents types
   ≪ 1 sents SIZE FOR j 
        sents j GET seps
        IF OVER DUP SIZE DUP SUB POS THEN 
           "=" types LAST DUP SUB + 
        ELSE "=N" END + 
      NEXT
 ≫ ≫ ''''STYPE'''' STO

 "hi there, how are you today? I'd like to present to you the washing machine 9001. You have been nominated to win one of these! Just make sure you don't break it" '''STYPE'''
{{out}}
<pre>
4: "hi there, how are you today?=Q"
3: " I'd like to present to you the washing machine 9001.=S"
2: " You have been nominated to win one of these!=E"
1: " Just make sure you don't break it=N"
</pre>

=={{header|V (Vlang)}}==
{{trans|Go}}
<syntaxhighlight lang="v (vlang)">fn sentence_type(s string) string {
    if s.len == 0 {
        return ""
    }
    mut types := []string{}
    for c in s.split('') {
        if c == '?' {
            types << "Q"
        } else if c == '!' {
            types << "E"
        } else if c == '.' {
            types << "S"
        }
    }
    if s[s.len-1..s.len].index_any('?!.') == -1 {
        types << "N"
    }
    return types.join("|")
}
 
fn main() {
    s := "hi there, how are you today? I'd like to present to you the washing machine 9001. You have been nominated to win one of these! Just make sure you don't break it"
    println(sentence_type(s))
}</syntaxhighlight>

{{out}}
<pre>
Q|S|E|N
</pre>

=={{header|Wren}}==
<syntaxhighlight lang="wren">var sentenceType = Fn.new { |s|
    if (s.count == 0) return ""
    var types = []
    for (c in s) {
        if (c == "?") {
            types.add("Q")
        } else if (c == "!") {
            types.add("E")
        } else if (c == ".") {
            types.add("S")
        }
    }
    if (!"?!.".contains(s[-1])) types.add("N")
    return types.join("|")
}

var s = "hi there, how are you today? I'd like to present to you the washing machine 9001. You have been nominated to win one of these! Just make sure you don't break it"
System.print(sentenceType.call(s))</syntaxhighlight>

{{out}}
<pre>
Q|S|E|N
</pre>
<br>
{{libheader|Wren-pattern}}
{{libheader|Wren-iterate}}
The following alternative version takes the simplistic view that (unless they end the final sentence of the paragraph) '''?''', '''!''' or '''.''' will only end a sentence if they're immediately followed by a space. This of course is nonsense, given the way English is written nowadays, but it's probably an improvement on the first version without the need to search through an inevitably incomplete list of abbreviations.
<syntaxhighlight lang="wren">import "./pattern" for Pattern
import "./iterate" for Indexed

var map = { "?": "Q", "!": "E", ".": "S", "": "N" }
var p = Pattern.new("[? |! |. ]")
var paras = [
    "hi there, how are you today? I'd like to present to you the washing machine 9001. You have been nominated to win one of these! Just make sure you don't break it",
    "hi there, how are you on St.David's day (isn't it a holiday yet?), Mr.Smith? I'd like to present to you (well someone has to win one!) the washing machine 900.1. You have been nominated by Capt.Johnson('?') to win one of these! Just make sure you (or Mrs.Smith) don't break it. By the way, what the heck is an exclamatory question!?"
]

for (para in paras) {
    para = para.trim()
    var sentences = p.splitAll(para)
    var endings = p.findAll(para).map { |m| m.text[0] }.toList
    var lastChar = sentences[-1][-1]
    if ("?!.".contains(lastChar)) {
        endings.add(lastChar)
        sentences[-1] = sentences[-1][0...-1]
    } else {
        endings.add("")
    }
    for (se in Indexed.new(sentences)) {
        var ix = se.index
        var sentence = se.value
        System.print("%(map[endings[ix]]) <- %(sentence + endings[ix])")
    }
    System.print()
}</syntaxhighlight>

{{out}}
<pre>
Q <- hi there, how are you today?
S <- I'd like to present to you the washing machine 9001.
E <- You have been nominated to win one of these!
N <- Just make sure you don't break it

Q <- hi there, how are you on St.David's day (isn't it a holiday yet?), Mr.Smith?
S <- I'd like to present to you (well someone has to win one!) the washing machine 900.1.
E <- You have been nominated by Capt.Johnson('?') to win one of these!
S <- Just make sure you (or Mrs.Smith) don't break it.
Q <- By the way, what the heck is an exclamatory question!?
</pre>

=={{header|XPL0}}==
<syntaxhighlight lang="xpl0">include xpllib; \for StrLen
int  Sentence, N, Len;
char Str;
[Sentence:= ["hi there, how are you today?",
             "I'd like to present to you the washing machine 9001.",
             "You have been nominated to win one of these!",
             "Just make sure you don't break it"];
for N:= 0 to 3 do
    [Str:= Sentence(N);
    Len:= StrLen(Str);
    case Str(Len-1) of
      ^!: ChOut(0, ^E);
      ^?: ChOut(0, ^Q);
      ^.: ChOut(0, ^S)
    other ChOut(0, ^N);
    if N < 3 then ChOut(0, ^|);
    ];
]</syntaxhighlight>

{{out}}
<pre>
Q|S|E|N
</pre>