String Character Length: Difference between revisions
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#REDIRECT [[String length]] |
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{{task}} |
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In this task, the goal is to find the length of a string. |
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==[[Ada]]== |
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'''Compiler:''' GCC 4.1.2 |
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Str : String := "Hello World"; |
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Length : constant Natural := Str'Length; |
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==[[C]]== |
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'''Standard:''' [[ANSI C]] (AKA [[C89]]): |
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'''Compiler:''' GCC 3.3.3 |
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#include <string.h> |
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int main(int argc, char ** argv) { |
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const char *string = "Hello, world!"; |
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size_t length = strlen(string); |
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return 0; |
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}; |
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or by hand: |
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int main(int argc, char ** argv) { |
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const char *string = "Hello, world!"; |
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int length=0; |
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p = string; |
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while (*p++ != '\0') length++; |
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return 0; |
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}; |
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or (for string literals only) |
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#include <stdlib.h> |
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int main() |
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{ |
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char const s[] = "Hello, world!"; |
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size_t length = sizeof s - 1; |
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return 0; |
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} |
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For wide character strings (usually Unicode): |
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#include <stdlib.h> |
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#include <stdio.h> |
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#include <wchar.h> |
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int main(int ac, char **av) { |
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wchar_t *s = L"\x304A\x306F\x3088\x3046"; /* Japanese hiragana ohayou */ |
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size_t length; |
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length = wcslen(s); |
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printf("Length in characters = %d\n",length); |
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printf("Length in bytes = %d\n",sizeof(s) * sizeof(wchar_t)); |
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exit(0); |
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} |
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==[[C++]]== |
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'''Standard:''' [[ISO C++]] (AKA [[C++98]]): |
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'''Compiler:''' g++ 4.0.2 |
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#include <string> // note: '''not''' <string.h> |
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int main() |
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{ |
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std::string s = "Hello, world!"; |
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std::string::size_type length = s.length(); |
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} |
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For wide character strings: |
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#include <string> |
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int main() |
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{ |
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std::wstring s = L"\u304A\u306F\u3088\u3046"; |
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std::wstring::size_type length = s.length(); |
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} |
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==[[C_Sharp|C#]]== |
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'''Platform:''' [[.NET]] |
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'''Language Version:''' 1.0+ |
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string s = "Hello, world!"; |
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int length = s.Length; |
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==[[Common Lisp]]== |
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(length "Hello World") |
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==[[Component Pascal]]== |
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LEN("Hello World") |
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==[[Java]]== |
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'''Compiler:''' any Java compiler should do |
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String s = "Hello, world!"; |
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int length = s.length(); |
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==[[JudoScript]]== |
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//Store length of hello world in length and print it |
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. length = "Hello World".length(); |
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==[[Lua]]== |
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'''Interpreter:''' [[Lua]] 5.0 or later. |
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string="Hello world" |
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length=#string |
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==[[mIRC]]== |
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'''Compiler:''' [[mIRC]] |
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alias stringlength { echo -a Your Name is: $len($$?="Whats your name") letters long! } |
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==[[Perl]]== |
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'''Interpreter:''' [[Perl]] any 5.X |
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my $length = length "Hello, world!"; |
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==[[PHP]]== |
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$length = strlen('Hello, world!'); |
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==[[Python]]== |
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'''Interpreter:''' [[Python]] 2.4 |
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length = len("The length of this string will be determined") |
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==[[Ruby]]== |
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string="Hello world" |
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print string.length |
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==[[Standard ML | SML]]== |
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'''Interpreter:''' [[Standard ML of New Jersey | SML/NJ]] 110.60, [[Moscow ML]] 2.01 (January 2004) |
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'''Compiler:''' [[MLton]] 20061107 |
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val strlen = size("Hello, world!"); |
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==[[Tcl]]== |
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'''Interpreter''' any 8.X. Tested on 8.4.12. |
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fconfigure stdout -encoding utf-8; #So that Unicode string will print correctly |
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set s1 "hello, world" |
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set s2 "\u304A\u306F\u3088\u3046" |
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puts [format "length of \"%s\" in characters is %d" $s1 [string length $s1]] |
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puts [format "length of \"%s\" in characters is %d" $s2 [string length $s2]] |
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==[[UNIX Shell]]== |
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With external utilities: |
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'''Interpreter:''' any bourne shell |
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string='Hello, world!' |
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length=`echo -n "$string" | wc -c | tr -dc '0-9'` |
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echo $length # if you want it printed to the terminal |
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With SUSv3 parameter expansion modifier: |
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'''Interpreter:''' [[Almquist SHell]] (NetBSD 3.0), [[Bourne Again SHell]] 3.2, [[Korn SHell]] (5.2.14 99/07/13.2), [[Z SHell]] |
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string='Hello, world!' |
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length="${#string}" |
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echo $length # if you want it printed to the terminal |
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==[[xTalk]]== |
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'''Interpreter:''' HyperCard |
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put the length of "Hello World" |
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or |
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put the number of characters in "Hello World" |
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Latest revision as of 19:31, 19 January 2008
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