ispunct Function

Test for a punctuation character.

Include

<ctype.h>

Prototype

int ispunct (int c);

Argument

c

The character to test.

Return Value

Returns a non-zero integer value if the character, c, is a punctuation character; otherwise, returns zero.

Remarks

A character is considered to be a punctuation character if it is a printable character which is neither a space nor an alphanumeric character. Punctuation characters consist of the following:

! " # $ % & ' ( ) ; < = > ? @ [ \ ] * + , - . / : ^ _ { | } ~

Example

#include <ctype.h>
#include <stdio.h>

int main(void)
{
  int ch;

  ch = '&';
  if (ispunct(ch))
    printf("& is a punctuation character\n");
  else
    printf("& is NOT a punctuation character\n");

  ch = '\t';
  if (ispunct(ch))
    printf("a tab is a punctuation character\n");
  else
    printf("a tab is NOT a punctuation character\n");
}

Example Output

& is a punctuation character
a tab is NOT a punctuation character