DragonFly On-Line Manual Pages

ISDIGIT(3)	      DragonFly Library Functions 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.  For single
     C chars locales the value of the argument is representable as an unsigned
     char or the value of EOF.	In the ASCII character set, this includes the
     following characters (with their numeric values shown in octal):

     060 ``0''	   061 ``1''	 062 ``2''     063 ``3''     064 ``4''
     065 ``5''	   066 ``6''	 067 ``7''     070 ``8''     071 ``9''

RETURN VALUES
     The isdigit() function returns zero if the character tests false and
     returns non-zero if the character tests true.

SEE ALSO
     ctype(3), ascii(7)

STANDARDS
     The isdigit() function conforms to ISO/IEC 9899:1990 (``ISO C90'').

DragonFly 3.5			 June 4, 1993			 DragonFly 3.5