isprint, isgraph : printable character predicate

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.

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**Authoritative source**: BUSMASTER DITA help source `isprint.dita`, compiled into `BUSMASTER.CHM` with the application.