isdigit(3)
- NetBSD Manual Pages
ISDIGIT(3) NetBSD Programmer's Manual ISDIGIT(3)
NAME
isdigit - decimal-digit character test
LIBRARY
Standard C Library (libc, -lc)
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
isalnum(3), isalpha(3), isascii(3), isblank(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 X3.159-1989 (``ANSI C'').
NetBSD 1.5 June 29, 1991 1
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