Summary of Variables

Chapter summary

In this chapter, we covered one of the two main pillars of programming—how we can store, retrieve, and change data in the computer’s memory using variables.

We learned that a variable has a name and a data type and that the type of the variable dictates what can be stored in it and how much memory it will use. We also learned how we could concisely name our variables and that there are naming conventions that we can use for guidance.

With that covered, we then talked about primary or primitive data types and saw that numbers are handled either as integers or floating-point numbers, which are further divided into different sizes, so we can pick a type that suits our needs and make sure we don’t waste memory space.