meet it

A checks one value and jumps to its .

A long chain of else if checks the same value again and again. A switch checks it once and jumps to the case label that matches. Each case runs its lines and ends with break, which leaves the switch.

Stack two labels with nothing between them and they share one body, as Medium and Large do here. The label catches every value no case named. A switch works on enums, numbers and text.

C# never lets one case run on into the next. Leave out a break and it refuses with CS0163, or CS8070 on the last label.

using System;

Size size = Size.Large;
switch (size)
{
    case Size.Small:
        Console.WriteLine("That is 2.50");
        break;
    case Size.Medium:
    case Size.Large:
        Console.WriteLine("That is 3.20");
        break;
    default:
        Console.WriteLine("Sorry, we do not make that size");
        break;
}

enum Size { Small, Medium, Large, Huge }

Ordering a Size.Huge here would land on default.

guess first

The adventurer shouts a command. What will this show?

Guess before you run it. Wrong guesses are how you learn, and nothing is marked.

using System;

string command = "LOOK";
switch (command.ToLower())
{
    case "go":
        Console.WriteLine("You walk north.");
        break;
    case "look":
        Console.WriteLine("You see a door.");
        break;
    default:
        Console.WriteLine("Pardon?");
        break;
}

your turn

Your turn. Build a game menu.

On line 12, add the label for choice 3. On line 15, add the label that catches every other number. Pick a choice on line 3, then press run.

Your code

output

press run to see what happens

fix it

The coin sorter will not start. Fix it!

Broken code to fix

output

press run to see what happens

C# says CS0163 on line 9: control cannot fall through from one case label to another.
Every case must end by leaving the switch. Which case on lines 9 and 10 forgets?
Add break; on a new line after line 10, then press run.

nailed it

you can jump straight to the answer. :D

A switch checks one value and jumps to its case.
Every case ends with break.
default catches everything the cases missed.

new words in your collection

switch
case
default

This lesson isn’t saved. A free account remembers every lesson you finish.

A switch checks one value and jumps to its case.

The adventurer shouts a command. What will this show?

Your turn. Build a game menu.

The coin sorter will not start. Fix it!

you can jump straight to the answer. :D

A checks one value and jumps to its .