Technical Reference: Base Operating System and Extensions, Volume 1

isblank Subroutine

Purpose

Tests for a blank character.

Syntax

#include <ctype.h>

int isblank (c)
int c;

Description

The isblank subroutine tests whether the c parameter is a character of class blank in the program's current locale.

The c parameter is a type int, the value of which the application shall ensure is a character representable as an unsigned char or equal to the value of the macro EOF. If the parameter has any other value, the behavior is undefined.

Parameters

Return Values

The isblank subroutine returns nonzero if c is a <blank>; otherwise, it returns 0.

Related Information

The ctype, isalpha, isupper, islower, isdigit, isxdigit, isalnum, isspace, ispunct, isprint, isgraph, iscntrl, or isascii Subroutines.

setlocale Subroutine in AIX 5L Version 5.2 Technical Reference: Base Operating System and Extensions Volume 2.