1.\" Copyright (c) 1991 The Regents of the University of California. 2.\" All rights reserved. 3.\" 4.\" This code is derived from software contributed to Berkeley by 5.\" the American National Standards Committee X3, on Information 6.\" Processing Systems. 7.\" 8.\" %sccs.include.redist.man% 9.\" 10.\" @(#)isxdigit.3 5.3 (Berkeley) 10/23/91 11.\" 12.Dd 13.Dt ISXDIGIT 3 14.Os 15.Sh NAME 16.Nm isxdigit 17.Nd hexadecimal-digit character test 18.Sh SYNOPSIS 19.Fd #include <ctype.h> 20.Ft int 21.Fn isxdigit "int c"; 22.Sh DESCRIPTION 23The 24.Fn isxdigit 25function tests for any hexadecimal-digit character. 26.Sh RETURN VALUES 27The 28.Fn isxdigit 29function returns zero if the character tests false and 30returns non-zero if the character tests true. 31.Sh SEE ALSO 32.Xr ctype 3 , 33.Xr ascii 7 34.Sh STANDARDS 35The 36.Fn isxdigit 37function conforms to 38.St -ansiC . 39