MODULE 1 · Getting started
Reading · 15 min
Variables and values
Variables and values
Variables connect a meaningful name to a value. Good names explain the role of the value, which makes later changes safer.
Learning objectives
- Choose between const and let
- Name values clearly
Store information with names that make a program easier to understand. Focus on explaining each decision in your own words before relying on a pattern or shortcut.
Example
const taxRate = 0.18;
let total = 120;
total = total + total * taxRate;Summary
KEY TAKEAWAYS
- Use const by default and let when reassignment is required.
- Names should describe what a value represents.
Reading material
Variables and values practice prompt
Use the exercise in this lesson to check your understanding.
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