Prime Number in C

#include <stdio.h>
void main()
{
int x,i,flag=0;
printf("enter the number");
scanf("%d",&x);
for(i=2;i<x;i++)
{
if(x%i==0){
flag=1;
break; }
}
   if (flag==0)
    {
printf("Number is prime");
     }
   else
{
printf("Number is not prime");
    }
}