The **`ispunct()`** function checks whether or not the character passed to it is a punctuation character.

# Library
```c++
#include<ctype.h>
```

# Declaration
Following is the declaration of `ispunct()` in C, where `c` is the character to be checked:

```c++
int ispunct(int c);
```



## Return value
The function returns an integer value.

If the integer returned is *non-zero (true)*, it means `c` is a punctuation character.

If the integer returned is *zero (false)*, it means `c` is not a punctuation character.

# Code

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

int main()
{
    //first 5 characters are punctuation characters
    char ch[] = {'$', '>', '@', '[', ',' ,' ', '\r', 'a', 'Z', '7'};
    
    int i = 0;
    while (i < 10) {
        if(ispunct(ch[i]))
            printf("Punctuation character.\n", ch[i]);
        else
            printf("Not a punctuation character.\n", ch[i]);        
        ++i;
    }
    
    return 0;
}

What is ispunct() in C?

Determines if a character is punctuation, returning non-zero for true, zero otherwise.