prime chec kin c

1int isPrime(long long number) {
2
3	if (number == 0 || number == 1 || (number % 2 == 0 && number > 2)) {
4		return 0;
5	}
6
7	else {
8		for (long long i=3; i <= (long long)sqrt(number)+1; i++) {
9			if (number % i == 0) {
10				return 0;
11			}
12		}
13		return 1;
14	}
15}

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