Using the ispunct() function in C

The ispunct() function in C is used to check whether a character is a punctuation character. The function takes a character as input and returns a non-zero value if the character is a punctuation character, or zero if the character is not a punctuation character.

A punctuation character is a character that is used to separate words or clauses in a sentence. Some examples of punctuation characters are:

• Period (.)

• Comma (,)

• Question mark (?)

• Exclamation point (!)

• Apostrophe (‘)

• Quotation mark (” or ‘)

• Hyphen (-)

• Dash (-)

• Slash (/)

• Backslash ()

Here is an example of how to use the ispunct() function:

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

int32_t main(int32_t argc, char const *argv[])
{
    char c = ',';

    int32_t result = ispunct(c);

    if (result > 0x00)
    {
        printf("The character '%c' is a punctuation character.\n", c);
    }
    else
    {
        printf("The character '%c' is not a punctuation character.\n", c);
    }

    return 0;
}

The ispunct() function takes a character as input and returns a non-zero value if the character is a punctuation character, or zero if the character is not a punctuation character. In this example, the character '.' is a punctuation character, so the function will return a non-zero value and the printf() statement will print the output.

Explore the complete list of functions available in ctype header in C standard library.