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 these characters only. The value of the
argument must be 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
The 4.4BSD extension of accepting
arguments outside of the range of the unsigned char
type in locales with large character sets is considered obsolete and may not
be supported in future releases. The iswspace()
function should be used instead.
SEE ALSO
STANDARDS
The isspace() function conforms to
ISO/IEC 9899:1990
(“ISO C90”).