TOLOWER(3)

NAME
tolower - upper case to lower case letter conversion

SYNOPSIS
#include <ctype.h>
int
tolower(int c);

DESCRIPTION
The tolower() function converts an upper-case letter to the corresponding lower-case letter.

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

SEE ALSO
isascii(3), isalnum(3), isalpha(3), iscntrl(3), isdigit(3), isgraph(3), islower(3), isprint(3), ispunct(3), isspace(3), isupper(3), isxdigit(3), toascii(3), toupper(3), stdio(3), ascii(7)

STANDARDS
The tolower() function conforms to ansiC.