When you write code, you need a way to store information — like a name, a number, or a true/false answer.
Variables are the containers that hold this information.
In this quick guide, you’ll learn what a variable is and how to use one in real code!
A variable is like a box with a label.
- You put something inside (a value).
- You can take it out or replace it.
- Your program can read or change it.
In most modern programming languages, you declare variables using keywords like let, const, or var (JavaScript example).
let age = 25; // age can change
const name = "Israel"; // name won't change
Try this:
- Copy the example code above.
- Change the value of
age— does it work? - Try changing
name— what happens?
Variables make your code dynamic and flexible — instead of hardcoding numbers or text, you store them in reusable containers.
When you master variables, you can handle user data, calculations, and more!
✅ Next up: Data Types!
You’ll learn the different kinds of data you can store in variables.
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