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JavaScript from Beginner to Professional

You're reading from   JavaScript from Beginner to Professional Learn JavaScript quickly by building fun, interactive, and dynamic web apps, games, and pages

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Product type Paperback
Published in Dec 2021
Publisher Packt
ISBN-13 9781800562523
Length 546 pages
Edition 1st Edition
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Authors (4):
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Codestars By Rob Percival Codestars By Rob Percival
Author Profile Icon Codestars By Rob Percival
Codestars By Rob Percival
Laurence Svekis Laurence Svekis
Author Profile Icon Laurence Svekis
Laurence Svekis
Maaike van Putten Maaike van Putten
Author Profile Icon Maaike van Putten
Maaike van Putten
Rob Percival Rob Percival
Author Profile Icon Rob Percival
Rob Percival
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Toc

Table of Contents (19) Chapters Close

Preface 1. Getting Started with JavaScript FREE CHAPTER 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

for loops

for loops are special loops. The syntax might be a little bit confusing at first, but you will find yourself using them soon, because they are very useful.

Here is what the syntax looks like:

for (initialize variable; condition; statement) { 
  // code to be executed
}

Between the parentheses following the for statement, there are three parts, separated by semi-colons. The first one initializes the variables that can be used in the for loop. The second one is a condition: as long as this condition is true, the loop will keep on iterating. This condition gets checked after initializing the variables before the first iteration (this will only take place when the condition evaluates to true). The last one is a statement. This statement gets executed after every iteration. Here is the flow of a for loop:

  1. Initialize the variables.
  2. Check the condition.
  3. If the condition is true, execute the code block. If the condition is false, the loop will...
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