JavaScript tips for Assignment 6

Until now, you’ve been using two markup languages, HTML and CSS. This week, you’ll begin using JavaScript, a programming language.

Markup languages change how things look.

A programming language makes things happen.

I’ve given you lots of resources for getting started with JavaScript.

This post provides a quick reference related to the assignment.

  1. What is a variable? How does it work? Watch this video. Also see Robbins, pages 465–466.
  2. What are the alert, prompt, and confirm dialogs? See figure 19-5 on page 464 in Robbins.
  3. How do I use the JavaScript console? Same video, at the 1:00 mark. Note: Use Chrome.
  4. How do I change the value of a variable? Same video.
  5. How can I use alert, prompt, and confirm dialogs? That’s in this video, at the beginning.
  6. What is an if-statement, and how can I use one? See Robbins, pages 470–471, and this video, starting at 6:59. This shows you everything a beginner needs to understand a basic if-statement in JavaScript.
  7. What is an array? Watch this video. See Robbins, page 468.
  8. What is a for-loop and how does it work? See this video at 6:54. See Robbins, pages 471–473.
  9. For-loops are continued in this video. How to loop over an array is specifically shown around 2:53 in that video.

NOTE that when you write console.log() in JavaScript, the string or instructions in parentheses will ONLY be seen in the JavaScript console. If you want something to appear in an alert, confirm or prompt dialog, you cannot use console.log() in your code.

One final note about this assignment: The point is NOT to teach you how to use alert, confirm and prompt dialogs. The point is to teach you how to use variables and arrays, which contain values that can be changed, and to use if-statements and for-loops to get work done.

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