tolower man page on 4.4BSD
[printable version]
TOLOWER(3) BSD Library Functions 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 C89”).
BSD June 4, 1993 BSD
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