tolower(3) - NetBSD Manual Pages

TOLOWER(3)              NetBSD Library Functions Manual             TOLOWER(3)


NAME
tolower -- upper case to lower case letter conversion
LIBRARY
Standard C Library (libc, -lc)
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
isalnum(3), isalpha(3), isascii(3), iscntrl(3), isdigit(3), isgraph(3), islower(3), isprint(3), ispunct(3), isspace(3), isupper(3), isxdigit(3), stdio(3), toascii(3), toupper(3), ascii(7)
STANDARDS
The tolower() function conforms to ANSI X3.159-1989 (``ANSI C89'').
CAVEATS
The argument to tolower() must be EOF or representable as an unsigned char; otherwise, the result is undefined. NetBSD 3.1.1 December 24, 2004 NetBSD 3.1.1

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