[2/12] Java Foundations Certification: Data Types and Variables

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Build a strong foundation of knowledge in Java programming! In this lesson we take a look at the different data types and how to use them!

In this free Java Foundations video, we explain some of the fundamental concepts in programming. For example – we will review how to use data types, variables, how variables are stored in the memory, how to convert from one data type to another

Each of these topics is explained with many real-life examples and hands-on exercises. As always, we advise you to pause the video right before solving part of a problem and try to do the exercises on your own first. Then, if you have difficulties, just watch the provided solutions in the video. If you still have questions, we’re always here to help! Join our Facebook group and ask away!

*The exercise descriptions are to be found in the PDF document at the end of this post.

If you are new to programming, make sure to watch the Free Full Java Basics course first, as it is a necessary prerequisite to this one. It explains the topics in a lot more detail, as this video aims to revise them and get to more complex topics after that.
This course is also perfect for people who have some background in programming with a different language and would like to pick up on Java.

Lesson Topics

This video covers the following topics:

Data Types and Variables

  • What is a data type?, Characteristics, Memory, Conventions, Variable Lifetime, Span and Scope

Integer and Real Number Types

  • Max/Min Values, Size, Overflow, Literals, Scientific Notation, Precision

Type Conversion

  • How to convert from one data type to another?, Explicit and Implicit Conversion

Boolean Type

  • Boolean Data Type – Overview

Character and String Types

  • Overview, Escaping Characters, Formatting Strings

Remember that coding is a skill, which should be practiced. To learn to code, you should write code, every day, for a long time. Watching tutorials is not enough. You should code! Now it’s your turn. Do your exercises!

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