11.
What is the purpose of the 'default' case in a 'switch' statement in C#?

12.
What does the 'continue' statement do in a loop in C#?

16.
What is the purpose of the 'if-else if-else' statement in C#?

19.
What is the purpose of the 'do-while' loop in C#?

20.
In C#, what is the syntax for a 'switch' statement?