tolower()

NAME

tolower(), _tolower() - upper case to lower case letter conversion

SYNOPSIS

#include <ctype.h>


int tolower (int c)
int _tolower (int c)

DESCRIPTION

The tolower(3) function converts an upper-case letter to the corresponding lower-case letter. If c is not an upper-case letter, it is not converted.

The _tolower(3) function does the same, but the argument c must be an upper-case letter. This routine is faster but will break with the wrong input.

RETURN VALUES

If the argument is an upper-case letter, the tolower(3) function returns the corresponding lower-case letter if there is one; otherwise the argument is returned unchanged.

SEE ALSO

isalnum(3)

isalpha(3)

isblank(3)

iscntrl(3)

isdigit(3)

isgraph(3)

islower(3)

isprint(3)

ispunct(3)

isspace(3)

isupper(3)

isxdigit(3)

toupper(3)