C# out parameters vs returns

Question

So I am new to C# and I am having difficulty understanding out. As opposed to just returning something from a function

using System;
class Retur         


        

Answer 1

When one variable is concerned out and return are OK. But what if you wanted to return more than 1 values? Out helps in that.

static void CalculateArea(out double r, out double Foo)
{
    //Can return 2 values in terms of out variables.
}

static double CalculateArea(double r)
{
     // Will return only one value.
}