| 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.
In the default "C" locale, the following uppercase letters ABCDEFGHIJKLMNOPQRSTUVWXYZ are replaced with respective lowercase letters abcdefghijklmnopqrstuvwxyz.
Parameters
| ch | - | character to be converted. If the value of ch is not representable as unsigned char and does not equal EOF, the behavior is undefined |
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()
{
unsigned 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 0xb8See also
| converts a character to uppercase (function) | |
| converts a character to lowercase using the ctype facet of a locale (function template) | |
| converts a wide character to lowercase (function) | |
C documentation for tolower | |
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