ISPRINT(3)

NAME
3.7 `isprint', `isgraph'--printable character predicates

SYNOPSIS
     #include <ctype.h>
     int isprint(int C);
     int isgraph(int C);

DESCRIPTION
`isprint' is a macro which classifies ASCII integer values by table lookup. It is a predicate returning non-zero for printable characters, and 0 for other character arguments. It is defined only when `isascii'(C) is true or C is EOF.
   You can use a compiled subroutine instead of the macro definition by undefining either macro using ``#undef isprint'' or ``#undef isgraph''.

RETURNS
`isprint' returns non-zero if C is a printing character, (`0x20'-`0x7E'). `isgraph' behaves identically to `isprint', except that the space character (`0x20') is excluded.

PORTABILITY
`isprint' and `isgraph' are ANSI C.
   No supporting OS subroutines are required.

SEE ALSO
isprint is part of the library. The full documentation for is maintained as a Texinfo manual. If info and are properly installed at your site, the command

    info

will give you access to the complete manual.