HP C/iX Library Reference Manual (30026-90004)

Chapter 5 225
HP C/iX Library Function Descriptions
isxdigit
isxdigit
Tests whether an argument is a hexadecimal digit.
Syntax
#include <ctype.h>
int isxdigit (int c );
Parameters
c An argument to be evaluated. The argument must be representable as an
unsigned char or the macro EOF.
Return Values
≠0 The argument passed in c is a hexadecimal digit.
0 The argument passed in
c is not a hexadecimal digit.
Description
The isxdigit function returns a nonzero value if the argument passed in c is a
hexadecimal digit (ASCII characters 0 through 9, A through F, and a through f); otherwise,
the returned value is zero.
See Also
isalnum, isalpha, iscntrl, isdigit, isgraph, islower, isprint, ispunct, isspace,
isupper, ANSI C 4.3.1.11, POSIX.1 8.1