Javascript Variables Development Tutorials, Guides & Insights

     const PI = 3.14;
     console.log(PI); // 3.14

• Valid: name, _age, $price
• Invalid: 1name, @value

let name = "Alice";
const age = 25;
var isStudent = true;

console.log(name, age, isStudent);

• let is used for variables that can be reassigned.
• const is for variables that should not be reassigned.
• var is an older way of declaring variables and is generally not recommended for new code.