1#include<stdio.h>
2main() {
3 int n, i, count=0;
4 printf("Enter Number");
5 scanf("%d",&n);
6
7 for ( i = 1; i<= n; i++) {
8 if (n % i == 1) {
9 count++;
10 }
11 }
12 if( count == 2) {
13 printf("Prime Number");
14 }
15 else {
16 printf("Not A Prime Number");
17 }
18}
1#include <stdio.h>
2int main()
3{
4 int i, num, p = 0;
5 printf("Please enter a number: \n");
6 scanf("%d", &num);
7 for(i=1; i<=num; i++)
8 {
9 if(num%i==0)
10 {
11 p++;
12 }
13 }
14 if(p==2)
15 {
16 printf("Entered number is %d "\
17 "and it is a prime number.",num);
18 }
19 else
20 {
21 printf("Entered number is %d "\
22 "and it is not a prime number.",num);
23 }
24}
25