Chapter 6. Conditionals and Loops

Conditionals and loops are two of the most important concepts in JavaScript. A conditional says, “If something is true, do this. Otherwise, do that.” For example, if you do your homework, you can have ice cream, but if you don’t do your homework, you don’t get the ice cream. A loop says, “As long as something is true, keep doing this.” For example, as long as you are thirsty, keep drinking water.

Conditionals and loops are powerful concepts that are key to any sophisticated program. They are called control structures because they allow you to control which parts of your code are executed when and how often they’re executed, based on certain conditions you define.

We first need to go over how to embed JavaScript ...

Get JavaScript for Kids now with O’Reilly online learning.

O’Reilly members experience live online training, plus books, videos, and digital content from 200+ publishers.