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TOLOWER(3)                  BSD Programmer's Manual                 TOLOWER(3)

NAME
     tolower - upper case to lower case letter conversion

SYNOPSIS
     #include <&lt;ctype.h>&gt;

     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 argu-
     ment 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 ANSI C X3.159-1989 (``ANSI C '').

4.4BSD                           June 4, 1993                                1