##### Synopsis

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

##### Description

isspace returns nonzero (true) if and only if the value of the argument c is a standard white-space character. The standard white-space characters are space (`' '`), form feed (`'\f'`), new-line (`'\n'`), carriage return (`'\r'`), horizontal tab (`'\t'`), and vertical tab (`'\v'`).

##### Portability

isspace conforms to ISO/IEC 9899:1990 (C90) and ISO/IEC 9899:1999 (C99).

##### See also

isblank