1.\" Copyright (c) 1991 The Regents of the University of California. 2.\" All rights reserved. 3.\" 4.\" %sccs.include.redist.man% 5.\" 6.\" @(#)isblank.3 5.1 (Berkeley) 10/23/91 7.\" 8.Dd 9.Dt ISBLANK 3 10.Os 11.Sh NAME 12.Nm isblank 13.Nd space or tab character test 14.Sh SYNOPSIS 15.Fd #include <ctype.h> 16.Ft int 17.Fn isblank "int c"; 18.Sh DESCRIPTION 19The 20.Fn isblank 21function tests for a space or tab character. 22.Sh RETURN VALUES 23The 24.Fn isblank 25function returns zero if the character tests false and 26returns non-zero if the character tests true. 27.Sh SEE ALSO 28.Xr ctype 3 , 29.Xr ascii 7 30