Using isgraph() and isprint() Function in C Program

In this program we will check if a particular character can be printed or not. This functionality can be achieved by making use of the isgraph() and isprint() method.

Though it is recommended to go through the basic difference among them, but they are almost alike. Both of them are defined under ctype.h library.

Below is a program on isgraph() and isprint() function.

#include<stdio.h>
#include<ctype.h> // to use isgraph() and isprint() method

int main()
{
    printf("\n\n\t\tStudytonight - Best place to learn\n\n\n");
    /*
        As datatypes are int, hence all the variables store the 
        ASCII values of the character on the rhs
    */
    int var1 = 'D';
    int var2 = '2';
    int var3 = ' \t';
    int var4 = 'Y';

    /*
        Returns true if the input parameter is an 
        ASCII value of an alphanumberic character
    */
    if(isgraph(var1)) 
    {
        printf("\n var1 = |%c| can be printed\n", var1);
    }
    else
    {
        printf("\n var1 =|%c| cannot be printed\n", var1);
    }

    if(isprint(var2))
    {
        printf("\n var2 = |%c| can be printed\n", var2);
    }
    else
    {
        printf("\n var2 =|%c| can't be printed\n", var2);
    }

    if(isgraph(var3))
    {
        printf("\n var3 = |%c| can be printed\n", var3);
    }
    else
    {
        printf("\n var3 =|%c| can't be printed\n", var3);
    }

    if(isprint(var4))
    {
        printf("\n var4 = |%c| can be printed\n", var4);
    }
    else
    {
        printf("\n var4 =|%c| can't be printed\n", var4);
    }

    printf("\n\n\t\t\tCoding is Fun !\n\n\n");
    return 0;
}

Output: