Variables – var, let and const

Variables – var, let and const — a practical guide to JavaScript var let const with clear examples you can reuse in real projects.

JavaScript Tutorial Series (11/101). Prefer one article? Read the complete JavaScript tutorial.

Short description

const for non-reassigned bindings; let for reassignment; avoid var in modern code.

Declarations

const PI = 3.14;
let count = 0;
count += 1;