Write a C++ Program To Find Prime Numbers.

What is a PRIME NUMBER?

" A Natural number greater than 1 which has only two divisor 1 and itself is called prime number ".

For Example:  

5 is prime, because it has only two divisors 1 and itself.

code-

    #include<iostream.h>

    #include<conio.h>

            void main()

            {

             //clrscr();

             int number,count=0;

    cout<<"ENTER NUMBER TO CHECK IT IS PRIME OR NOT ";

              cin>>number;

               for(int a=1;a<=number;a++)

                   {

                    if(number%a==0)

                       {

                      count++;

                       }

                   }

           if(count==2)

             {

              cout<<" PRIME NUMBER \n";

             }

           else

             {

              cout<<" NOT A PRIME NUMBER \n";

             }

           //getch();

           }