7.4.1.10 The isspace function

Synopsis

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#include <ctype.h>
int isspace(int c);

Description

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The isspace function tests for any character that is a standard white-space character or is one of a locale-specific set of characters for which isalnum is false. The standard white-space characters are the following: space (’ ‘), form feed (’\f’), new-line (’\n’), carriage return (’\r’), horizontal tab (’\t’), and vertical tab (’\v’). In the “C” locale, isspace returns true only for the standard white-space characters.