JavaScript
JavaScript VariablesJavaScript Variables
JavaScript variables store data values for later use.
Read Time
5 min readDifficulty
BeginnerLast Updated
Jun 15, 2026Version
v1.0.0Introduction
JavaScript uses variables as named containers to hold data. Developers declare these variables using specific keywords before assigning them a value. Modern JavaScript strongly encourages using `let` and `const` instead of the older `var` keyword.
Example
Example
Key Points
- Variables store reusable data.
- The `let` keyword creates changeable variables.
- The `const` keyword creates unchangeable variables.
- The `var` keyword is an older way to declare variables.