Namespace with Variables and Functions

#include <iostream>
using namespace std;

namespace MathOps {
    int x = 10;
    int square(int n) {
        return n * n;
    }
}

int main() {
    cout <<"x="<<MathOps :: x<<endl;
    cout<<"Square="<<MathOps :: square(MathOps :: x);
    
    
    
   
    return 0;
}