HTML CSS and JavaScript for Beginners - A Web Design Course - JavaScript Try it, Exercise #1

The video tutorial guides learners to update a JavaScript code snippet to display 'Hello World' using variables. It begins by instructing viewers to apply previous lessons to fix an error where 'message' is not defined. The solution involves declaring a variable 'message' and assigning it the string 'Hello World'. The tutorial explains how this variable can be used to update the inner HTML of an element. Viewers are encouraged to experiment by customizing the message. The video concludes with a preview of the next topic, which is the use of operators in JavaScript.

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