C program to find if a number is prime or not.

 Q. Write a C program to find if a number is prime or not.

Ans:

#include <stdio.h>

int main() {

    int n, i = 2;

    printf("Enter any number: ");

    scanf("%d", &n);

    if (n <= 1) {

        printf("Input Error\n");

    } else {

        while (i < n) {

            if (n % i == 0) {

                printf("Number is not prime\n");

                break;

            }

            i++;

        }

        if (i == n) {

            printf("Number is Prime\n");

        }

    }

    return 0;

}