Check , given number is PRIME or not .....

Program use to find the input number is prime or not. Simple logic is applied  if(num%i==0) with the help of count variable ,we identify the prime number.




Source Code:-

#include<iostream.h>

#include<conio.h>

void main()

{ clrscr();

   int num, i,count=0;

   cout<<"Program to check no. is Prime (by: Tarun Rawat)\n\n";

   cout<<"Enter number to check Prime or not :- ";

   cin>>num;

   for(i=2;i<=num;i++)

     { if(num%i==0)

 count=count+1;

     }

     if(count==1)

       cout<<"\n"<<num<<" is a Prime number";

     else cout<<"\n"<<num<<" is not a prime number";

getch();

}