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JavaScript from Beginner to Professional

You're reading from  JavaScript from Beginner to Professional

Product type Book
Published in Dec 2021
Publisher Packt
ISBN-13 9781800562523
Pages 546 pages
Edition 1st Edition
Languages
Authors (3):
Laurence Lars Svekis Laurence Lars Svekis
Profile icon Laurence Lars Svekis
Maaike van Putten Maaike van Putten
Profile icon Maaike van Putten
Codestars By Rob Percival Codestars By Rob Percival
Profile icon Codestars By Rob Percival
View More author details

Table of Contents (19) Chapters

Preface 1. Getting Started with JavaScript 2. JavaScript Essentials 3. JavaScript Multiple Values 4. Logic Statements 5. Loops 6. Functions 7. Classes 8. Built-In JavaScript Methods 9. The Document Object Model 10. Dynamic Element Manipulation Using the DOM 11. Interactive Content and Event Listeners 12. Intermediate JavaScript 13. Concurrency 14. HTML5, Canvas, and JavaScript 15. Next Steps 16. Other Books You May Enjoy
17. Index
Appendix – Practice Exercise, Project, and Self-Check Quiz Answers

Summary

In this chapter we introduced the concept of loops. Loops enable us to repeat a certain block of code. We need some sort of condition when we loop, and as long as that condition is true, we'll keep looping. As soon as it changes to false, we end our loop.

We have seen the while loop, in which we just insert a condition, and as long as that condition is true we keep looping. If the condition is never true, we won't even execute the loop code once.

This is different for the do while loop. We always execute the code once, and then we start to check a condition. If this condition is true, we execute the code again and do so until the condition becomes false. This can be useful when working with input from outside, such as user input. We would need to request it once, and then we can keep on requesting it again until it is valid.

Then we saw the for loop, which has a slightly different syntax. We have to specify a variable, check a condition (preferably using...

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