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Difference between revisions of "cpp/string/byte/tolower"

From cppreference.com
< cpp‎ | string‎ | byte
m (Shorten template names. Use {{lc}} where appropriate.)
m (Update links.)
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===See also===
 
===See also===
 
{{dsc begin}}
 
{{dsc begin}}
{{dsc inc | cpp/string/byte/dcl list toupper}}
+
{{dsc inc | cpp/string/byte/dsc toupper}}
{{dsc inc | cpp/locale/dcl list tolower}}
+
{{dsc inc | cpp/locale/dsc tolower}}
{{dsc inc | cpp/string/wide/dcl list towlower}}
+
{{dsc inc | cpp/string/wide/dsc towlower}}
 
{{dsc see c | c/string/byte/tolower}}
 
{{dsc see c | c/string/byte/tolower}}
 
{{dsc end}}
 
{{dsc end}}

Revision as of 22:25, 31 May 2013

Defined in header <cctype>
int tolower( int ch );

Converts the given character to lowercase according to the character conversion rules defined by the currently installed C locale.

Contents

Parameters

ch - character to be converted

Return value

Lowercase version of ch or unmodified ch if no lowercase version is listed in the current C locale.

Example

#include <iostream>
#include <cctype>
#include <clocale>
 
int main()
{
    char c = '\xb4'; // the character Ž in ISO-8859-15
                     // but ´ (acute accent) in ISO-8859-1 
 
    std::setlocale(LC_ALL, "en_US.iso88591");
    std::cout << std::hex << std::showbase;
    std::cout << "in iso8859-1, tolower('0xb4') gives "
              << std::tolower(c) << '\n';
    std::setlocale(LC_ALL, "en_US.iso885915");
    std::cout << "in iso8859-15, tolower('0xb4') gives "
              << std::tolower(c) << '\n';
}

Output:

in iso8859-1, tolower('0xb4') gives 0xb4
in iso8859-15, tolower('0xb4') gives 0xb8

See also

converts a character to uppercase
(function) [edit]
converts a character to lowercase using the ctype facet of a locale
(function template) [edit]
converts a wide character to lowercase
(function) [edit]
C documentation for tolower