using System;

​

float milesToKm(float miles)

{

    float result = miles * 1.6f;

    return result;

}

​

void printStringWithPrefix(string theStr, string prefix="")

{

    Console.WriteLine($"{prefix}{theStr}");

}

​

Console.WriteLine($"The result is {milesToKm(8.0f)}km.");

Console.WriteLine($"The result is {milesToKm(52.0f)}km.");

​

printStringWithPrefix("Test String");

printStringWithPrefix("Another Test String","::> ");

printStringWithPrefix(prefix:"Here is ", theStr:"Another String");