If you type a ; (semicolon) anywhere in your program, the compiler will
ignore anything after it until the carriage return. This means we can add
comments in our program to remind us of what on earth we were doing in
the first place. This is good practice, even for the simplest programs.
You may well fully understand how your program works now, but in a few
months time, you may be scratching your head. So, use comments
wherever you can – there is no limit.