Find prime number in c++

---

---

How to find prime number in c++

#include<iostream>

#include<iomanip>

int main(){

    int num,i,count,n;

    cout << "Enter max range: ";

    cin >> n;

    for(num = 1;num<=n;num++){

         count = 0;

         for(i=2;i<=num/2;i++){

             if(num%i==0){

                 count++;

                 break;

             }

        }

       

         if(count==0 && num!= 1)

              cout << num << setw(3);

    }

 

   return 0;

}

C++ program to check whether a number is not a perfect number or not

C++ program to print all perfect numbers in given max range

Perfect numbers in given range by c++

Programs of c++

---

---