Rewrite 2.4 Control Flow

[tomiam8]

2.4 Control Flow covers if statements, but currently it's fragmented and dosen't have a clear thread explaining what's happen.

As mark suggested, we could explain it better by having a clear progression through complexity rather than just jumping around a bit like we do.

For example, pregressivly adding functionality to a mock account system that asks for input.
(Ask if they would like to delete their account. if so, set some variable to 0)
E.g.
Single line if:

if (userInput) someVarable = Null;

Then explain how you might want more functionality, i.e. execute multiple lines

if (userInput) {
    someVaraible = Null;
    System.out.println("Data deleted");
}

Then go on through:

• Ask user to write some string like "Yes"
• Explain numerical operators ( > / < / >= / etc.) IDK a good example for it though.
• Do If / Else (Say print something if they don't want to delete)
• Do If / Elif / Else (Say giving them three options)
• Do switch statements

I would write this now... but I'm preparing for this friday's workshops and writing algorithims, so it's a remainder here for next year or something.