Code to sort out Prime numbers

#include <stdio.h>

int main()
{
int d, n;

printf("Enter a number: ");
scanf("%d", &n);

for (d=2 ; d<n ; d++){
if(n%2==0)
break;
}

if(d<n)
printf("%d is divisible by %d", n, d);
else
printf("%d is a prime number", n);


return 0;
}