There are probably millions of programs in the world now, but all programs are made of three different "flows", or control structures: sequential, branching and looping.
Sequential execution goes from top to bottom, line by line.
Branching execution allows you to make decisions based on a condition:
You can even embed a branching structure in one branch:
Or, making one decision right after another:
B. So what's the third and last type of flow (control structure)?
C. Try to write some pseudo code to add all even numbers between 200 and 300.