String Character Length: Difference between revisions
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(string-length "Hello world") |
(string-length "Hello world") |
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==[[Smalltalk]]== |
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[[Category:Smalltalk]] |
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string := 'Hello, world!". |
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string size. |
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==[[Standard ML]]== |
==[[Standard ML]]== |
Revision as of 21:13, 24 January 2007
![Task](http://static.miraheze.org/rosettacodewiki/thumb/b/ba/Rcode-button-task-crushed.png/64px-Rcode-button-task-crushed.png)
You are encouraged to solve this task according to the task description, using any language you may know.
In this task, the goal is to find the length of a string.
Ada
Compiler: GCC 4.1.2
Str : String := "Hello World"; Length : constant Natural := Str'Length;
C
Compiler: GCC 3.3.3
#include <string.h> int main(void) { const char *string = "Hello, world!"; size_t length = strlen(string); return 0; }
or by hand:
int main(void) { const char *string = "Hello, world!"; int length = 0; p = string; while (*p++ != '\0') length++; return 0; }
or (for arrays of char only)
#include <stdlib.h> int main(void) { char const s[] = "Hello, world!"; size_t length = sizeof s - 1; return 0; }
For wide character strings (usually Unicode):
#include <stdio.h> #include <wchar.h> int main(void) { wchar_t *s = L"\x304A\x306F\x3088\x3046"; /* Japanese hiragana ohayou */ size_t length; length = wcslen(s); printf("Length in characters = %d\n", length); printf("Length in bytes = %d\n", sizeof(s) * sizeof(wchar_t)); return 0; }
C++
Standard: ISO C++ (AKA C++98):
Compiler: g++ 4.0.2
#include <string> // note: not <string.h> int main() { std::string s = "Hello, world!"; std::string::size_type length = s.length(); }
For wide character strings:
#include <string> int main() { std::wstring s = L"\u304A\u306F\u3088\u3046"; std::wstring::size_type length = s.length(); }
C#
Platform: .NET Language Version: 1.0+
string s = "Hello, world!"; int length = s.Length;
ColdFusion
#len("Hello World")#
Common Lisp
(length "Hello World")
Component Pascal
LEN("Hello, World!")
Forth
Interpreter: ANS Forth
CREATE s ," Hello world" \ create string "s" s C@ ( -- length )
Haskell
Compiler: GHC 6.6
val strlen = length "Hello, world!"
Java
Compiler: any Java compiler should do
String s = "Hello, world!"; int length = s.length();
JavaScript
var s = "Hello, world!"; int len = s.length;
JudoScript
//Store length of hello world in length and print it . length = "Hello World".length();
Lua
Interpreter: Lua 5.0 or later.
string="Hello world" length=#string
mIRC
Compiler: mIRC
alias stringlength { echo -a Your Name is: $len($$?="Whats your name") letters long! }
OCaml
Interpreter/Compiler: Ocaml 3.09
String.length "Hello world";;
Perl
Interpreter: Perl any 5.X
my $length = length "Hello, world!";
PHP
$length = strlen('Hello, world!');
Python
Interpreter: Python 2.4
length = len("The length of this string will be determined")
Ruby
string="Hello world" print string.length
Scheme
(string-length "Hello world")
Smalltalk
string := 'Hello, world!". string size.
Standard ML
Interpreter: SML/NJ 110.60, Moscow ML 2.01 (January 2004)
Compiler: MLton 20061107
val strlen = size "Hello, world!";
TCL
Basic version:
string length "Hello, world!"
or more elaborately, needs Interpreter any 8.X. Tested on 8.4.12.
fconfigure stdout -encoding utf-8; #So that Unicode string will print correctly set s1 "hello, world" set s2 "\u304A\u306F\u3088\u3046" puts [format "length of \"%s\" in characters is %d" $s1 [string length $s1]] puts [format "length of \"%s\" in characters is %d" $s2 [string length $s2]]
UNIX Shell
With external utilities:
Interpreter: any bourne shell
string='Hello, world!' length=`echo -n "$string" | wc -c | tr -dc '0-9'` echo $length # if you want it printed to the terminal
With SUSv3 parameter expansion modifier:
Interpreter: Almquist SHell (NetBSD 3.0), Bourne Again SHell 3.2, Korn SHell (5.2.14 99/07/13.2), Z SHell
string='Hello, world!' length="${#string}" echo $length # if you want it printed to the terminal
xTalk
Interpreter: HyperCard
put the length of "Hello World"
or
put the number of characters in "Hello World"