tolower()

convert uppercase letter to lowercase 

Function

SYNOPSIS

#include <ctype.h>

int tolower(int c);

DESCRIPTION

The tolower() function converts an uppercase letter to the corresponding lowercase letter.

PARAMETERS

c 

An integer, the value of which is representable as an unsigned char, or the value of the macro EOF.

RETURN VALUES

If the parameter is a character for which isupper() is true and there is a corresponding character for which islower() is true, the tolower() function returns the corresponding character. Otherwise, the parameter is returned unchanged.

CONFORMANCE

ANSI/ISO 9899-1990.

MULTITHREAD SAFETY LEVEL

MT-Safe, with exceptions.

This function is MT-Safe as long as no thread calls setlocale() while this function is executing.

PORTING ISSUES

None.

AVAILABILITY

MKS Toolkit for Professional Developers
MKS Toolkit for Enterprise Developers
MKS Toolkit for Enterprise Developers 64-Bit Edition

SEE ALSO

Functions:
_tolower(), _toupper(), islower(), isupper(), setlocale(), toascii(), toupper()

MKS Toolkit 9.2 Documentation Build 16.