I am new to writing code.

That being said, I run the *.exe and it executes however there is no output

I have the code copied line for line, I've triple checked and had a friend who writes code for a living check. It compiles, no errors found.....

But no output either.

I think I may have had this issue with the compiler before, but don't remember. I am using dev-c++ 4.9.9.2

Code:
/* demonstating paraments */

#include <iostream>
using namespace std;

void mul(int x, int y); //mul prototype

int main()
{
    mul(10, 20); //calling mul function
    mul(5, 10);
    mul(23, 72);
    
    return 0;
}

void mul(int x, int y)
{
     cout << x * y << " ";
     }