Program to find whether given no. is a prime no. or not.

			#include<stdio.h>
			#include<conio.h>
			void main()
			{
			int i,n,r=0;
			clrscr();
			printf("Enter any no: ");
			scanf("%d",&n);
			for(i=2;i<=n-1;i++)
			{
			if(n%i==0)
			r=1;
			break;
			}
			if(r==0)
			printf("prime no");
			else
			printf("Not prime");
			getch();
			}
Output:
Enter any no: 16
Not prime