tolower(3) - NetBSD Manual Pages

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TOLOWER(3)                NetBSD Programmer's Manual                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 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 X3.159-1989 (``ANSI C'').

4.4BSD                           June 29, 1991                               1