using System;

using System.Text;

public class Program

{

    public static void Main()

    {

        // Concatenation uses the + operator to combine strings and variables

        var life = "life";

        var universe = "universe";

        var everything = "everything";

        var answer = 42;

        Console.WriteLine("The answer to " + life + ", the " + universe + ", and " + everything + " is " + answer);

        // Interpolation uses $ at the beginning and curly brackets {} to insert variables

        Console.WriteLine($"The answer to {life}, the {universe}, and {everything} is {answer}");

        // String builder saves the final string only on the 'ToString()' method

        var builder = new StringBuilder();

        builder.Append("The answer to ");

        builder.Append(life);

        builder.Append(", the ");

        builder.Append(universe);

        builder.Append(", and ");

        builder.Append(everything);

        builder.Append(" is ");

        builder.Append(answer);

        Console.WriteLine(builder.ToString());

    }

}