Program to check a number is prime or not

#include<stdio.h>
#include<conio.h>

void main()
{
int n,i,flag=1;
clrscr(); //to clear the screen
printf("\n Enter a number : ");
scanf("%d",&n);
for(i=2;i<n/2;++i)
if(n%i==0)
{
flag=0;
break;
}
if(flag==1)
printf("\n The given number is prime");
else
printf("\n The given number is not prime");
getch(); //to stop the screen
}



                                              Output