In part 1 of chapter 4 you’ll discover the fundamentals of data processing, which is what computers actually do. You find out how variables can hold data values and how programs can use expressions to manipulate these values.

You can find a draft of the book and all the code samples here.

You can find the screencast for Code Analysis 1: Evaluate Expressions here.

You can find the screencast for Make Something Happen 1: Working with Variables here.

You can find the screencast for Make Something Happen 2: Random Numbers here.