Math and Troubleshooting Errors

Recap

• in-class code

Housekeeping

• in-class repo added
• Lab Time is text-only this afternoon (early dismissal)
• Week 5 schedule tweaked
• Homework for Day 3 and Day 4 posted

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1. Debugging Errors with Variables

Materials

• Storing the information you need — Variables
• What went wrong? Troubleshooting JavaScript

Slides

• JS Variables and Troubleshooting Errors

2. Basic math in JS

Materials

• Basic math in JavaScript — numbers and operators
• Example Gists:
  • Tip Calculator
  • Refactor Adding Machine to create Simple Calculator

Activity

• Fix Syntax errors in Adding Machine

3. More Error Handling

Some extra tutorials to practice your debugging.

Materials

• Tutorial: Best Debugging Tips For Beginners
• Tutorial: Debugging with Chrome Developer Tools
  • Companion Video
  • Buggy Demo Code

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Lab Time

There will be no class this afternoon but Instructors and Facilitators will be monitoring the Slack channel for questions.

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Prep

MDN Readings

• Basic math in JavaScript — numbers and operators
• What went wrong? Troubleshooting JavaScript
• Using data attributes

Other Resources

• JavaScript type coercion explained on Free Code Camp
• Watch: JavaScript Tutorial for Beginners by Mosh Hamedani
  • This is an excellent overview of the starter JS concepts you'll need for the rest of this course.
  • There is a handy Table of Contents in the video description.

Free Code Camp Exercises

• Javascript basics: Exercises 9-22
  • Start: Add Two Numbers with JavaScript
  • Complete and Stop (or not): Compound Assignment With Augmented Division