Write a C code to read a number and check whether it is prime. A function isPrime() is used here.

 Source code:

/A Prime number is a natural number greater than 1 which has no positive divisors other than 1 and itself. Write a C code to read a number and check whether it is prime. A function isPrime() is used here.*/

#include <stdio.h>

int isPrime(int num);

int isPrime(int num)

{

    int i;

    for(i=2; i<=num/2; i++)

    {

      /* If the number is divisible by any number

         other than 1 and self then it is not prime */

        if(num%i == 0)

        {

            return 0;

}

    }

    return 1;

}

int main()

{

    int num;

printf("Enter a number:");

    scanf("%d", &num);

    

    if(isPrime(num))

    {

        printf("%d is Prime Number", num);

    }

    else

    {

        printf("%d is not Prime Number", num);

    }

return 0;

}

Output: