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NetBSD 6.1.5 - man page for isblank (netbsd section 3)

ISBLANK(3)			   BSD Library Functions Manual 		       ISBLANK(3)

NAME
     isblank -- blank-space character test

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     #include <ctype.h>

     int
     isblank(int c);

DESCRIPTION
     The isblank() function tests for the standard blank-space characters.  The standard blank-
     space characters are the following:

	   ' '	  Space character.
	   \t	  Horizontal tab.

     In the ``C'' locale, isblank() returns true only for the standard blank-space characters.

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

SEE ALSO
     ctype(3), isalnum(3), isalpha(3), isascii(3), iscntrl(3), isdigit(3), isgraph(3),
     islower(3), isprint(3), ispunct(3), isspace(3), isupper(3), isxdigit(3), stdio(3),
     toascii(3), tolower(3), toupper(3), ascii(7)

CAVEATS
     The argument to isblank() must be EOF or representable as an unsigned char; otherwise, the
     behavior is undefined.  See the CAVEATS section of ctype(3) for more details.

BSD					  April 17, 2008				      BSD


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