148905Scael.\" Copyright (c) 1991 The Regents of the University of California. 248905Scael.\" All rights reserved. 348905Scael.\" 4*50304Sbostic.\" This code is derived from software contributed to Berkeley by 5*50304Sbostic.\" the American National Standards Committee X3, on Information 6*50304Sbostic.\" Processing Systems. 7*50304Sbostic.\" 848905Scael.\" %sccs.include.redist.man% 948905Scael.\" 10*50304Sbostic.\" @(#)isdigit.3 5.2 (Berkeley) 06/29/91 1148905Scael.\" 1248905Scael.Dd 1348905Scael.Dt ISDIGIT 3 1448905Scael.Os 1548905Scael.Sh NAME 1648905Scael.Nm isdigit 1748905Scael.Nd decimal-digit character test 1848905Scael.Sh SYNOPSIS 1948905Scael.Fd #include <ctype.h> 2048905Scael.Ft int 2148905Scael.Fn isdigit "int c" 2248905Scael.Sh DESCRIPTION 2348905ScaelThe 2448905Scael.Fn isdigit 2548905Scaelfunction tests for any decimal-digit character. 2648905Scael.Sh RETURN VALUES 2748905ScaelThe 2848905Scael.Fn isdigit 2948905Scaelmacro returns zero if the character tests false and 3048905Scaelreturns non-zero if the character tests true. 3148905Scael.Sh SEE ALSO 3248905Scael.Xr isascii 3 , 3348905Scael.Xr isalnum 3 , 3448905Scael.Xr isalpha 3 , 3548905Scael.Xr iscntrl 3 , 3648905Scael.Xr isdigit 3 , 3748905Scael.Xr isgraph 3 , 3848905Scael.Xr islower 3 , 3948905Scael.Xr isprint 3 , 4048905Scael.Xr ispunct 3 , 4148905Scael.Xr isspace 3 , 4248905Scael.Xr isupper 3 , 4348905Scael.Xr isxdigit 3 , 4448905Scael.Xr toascii 3 , 4548905Scael.Xr tolower 3 , 4648905Scael.Xr toupper 3 , 4748905Scael.Xr stdio 3 4848905Scael.Xr ascii 7 4948905Scael.Sh STANDARDS 5048905ScaelThe 5148905Scael.Fn isdigit 5248905Scaelfunction conforms to 5348905Scael.St -ansiC . 54