Computer Science - Web Development - JavaScript basics - JavaScript Essentials

5 steps. Step 1 'Variables': let name = 'Alice' (reassignable). const PI = 3.14 (constant). var x = 5 (old style - avoid). Types: string, number, boolean, null, undefined, object, array. Step 2 'Functions': function greet(name) { return 'Hello, ' + name; }. Arrow: const greet = (name) => 'Hello, ' +