Name

isspace - white-space character test

Library

Standard C Library (libc, -lc)

Synopsis

#include <ctype.h>

int
isspace(int c);

Description

The isspace() function tests for the white-space characters. For any locale, this includes the following standard characters:

``\t'' ``\n'' ``\v'' ``\f'' ``\r'' `` `'

In the
C locale isspace() successful test is limited to this characters only. For single C chars locales (see multibyte(3) ) the value of the argument is representable as an unsigned char or the value of EOF.

Return Values

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

Compatibility

Although isspace() accepts arguments outside of the range of the unsigned char type in locales with large character sets, this is a 4.4BSD extension and the iswspace() function should be used instead for maximum portability.

See Also

ctype(3) , iswspace(3) , multibyte(3) , ascii(7)

Standards

The isspace() function conforms to ISO/IEC 9899:1990 (``ISO C89'').

Table of Contents

• Name
• Library
• Synopsis
• Description
• Return Values
• Compatibility
• See Also
• Standards