C in a Nutshell

Name

ispunct

Synopsis

Ascertains whether a given character is a punctuation mark

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

The function ispunct() tests whether its character argument is a punctuation mark. If the character is a punctuation mark, ispunct() returns a nonzero value (that is, true); if not, the function returns 0 (false).

The punctuation characters are dependent on the current locale setting for the category LC_CTYPE, which you can query or change using the setlocale() function. In the default locale C, the punctuation characters are all of the graphic characters (those for which isgraph() is true), except the alphanumeric characters (those for which isalnum() is true).

Example

See the example for isprint() in this chapter.

See Also

The corresponding C99 function for wide characters, iswpunct(); isalnum(), isalpha(), isblank(), iscntrl(), isdigit(), isgraph(), islower(), isprint(), isspace(), isupper(), isxdigit()