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This video tutorial explains what are function parameters and return values in c++.
You will learn how to pass values to a function, how to return values from a function in detail with examples.

source code for this tutorial

#include <iostream>

using namespace std;

int display(int,int);

int main()
{
    int result;
    result = display(20,30);

    cout << "result is " << result;

    return 0;
}

int display(int a, int b){

    cout << a <<endl;
     cout << b <<endl;

    return a+b;
}