Can someone please write a code for prime numbers using flag?

Answer 1

#include <iostream>
using namespace std;
int main()
{
int n, i, flag;
flag = 1;
cout << "Enter a positive integer: ";
cin >> n;
for(i = 2; i <= n / 2; ++i)
{ if(n % i == 0)
{ flag = 0;
break; }
}
if (flag==1)
cout << "This is a prime number";
else cout << "This is not a prime number";
return 0; }

Answer 2

#include<iostream>

using namespace std;

int main()

{

    int number,count=0;

    cout<<"Enter number to check its Prime or Not : ";

    cin>>number;

    for(int a=1;a<=number;a++)

        if(number%a==0)

            count++;

    if(count==2)

        cout<<"Its Prime Number \n";

    else

        cout<<"Its not a Prime Number\n";

    return 0;

}
just go through the course here you will learn more and just code and practice 😊

Answer 3

Thank you Ankit
Thank you Gawen

Answer 4

.

Answer 5

1000