To remember

In this chapter we will learn more about program code, what types of data there are, and make our programs adapt to what the user wants.

Data types

In this section we will examine what kinds of variables we can create, and what kinds of information a computer can handle, known as datatypes.
Interactive

In this section, we will start writing interactive programs - programs that do different things depending on what we say when we run it.
When it goes wrong

In this section we will become better at understanding what errors can occur and to make use of the help that the computer can offer.
Geometry

In this section we will write a program that draws different geometric shapes with the help of our friend the turtle.
Modules

In this section, we will talk about some different modules (math, random, time) that will help us build smart programs and games.

Older computers didn't have icons, pictures or colors like today. Instead, commands were entered as text, and the computer responded in text. Many programs still work like that way and that's exactly what input and print can be used for.

Image programs like Paint or Photoshop draw and change the color of many thousands of pixels at a time, but they only do it with faster turtles.

Difficulty level

Easy Medium Hard