output: find if number is prime or not
input:
input:
#include<stdio.h>
#include<conio.h>
void main()
{
clrscr();
int num,i,c;
scanf("%d",&num);
for(i=2;i<num;i++)
{
if(num%i==0)
c=1;
}
c==1?printf(""):printf("%d is prime",num);
getch();
}