isdigit man page on BSDOS
[printable version]
ISDIGIT(3) BSD Programmer's Manual ISDIGIT(3)
NAME
isdigit - decimal-digit character test
SYNOPSIS
#include <ctype.h>
int
isdigit(int c);
DESCRIPTION
The isdigit() function tests for any decimal-digit character.
RETURN VALUES
The isdigit() macro returns zero if the character tests false and returns
non-zero if the character tests true.
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), tolower(3), toupper(3),
stdio(3) ascii(7)
STANDARDS
The isdigit() function conforms to ANSI C X3.159-1989 (``ANSI C '').
BSDI BSD/OS June 29, 1991 1
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