JS

Variables

let x = 10; const y = 20; var z = "Hello"; console.log(x + y);

Functions

function greet(name) { return "Hello " + name; } console.log(greet("Alice"));

Events

<button onclick="sayHi()">Click me</button> <script> function sayHi() { alert("Hi there!"); } </script>

DOM Manipulation

document.getElementById("demo").innerHTML = "Changed!"; document.querySelector("p").style.color = "red";

Loops

for (let i = 0; i < 5; i++) { console.log(i); } let arr = [1, 2, 3]; arr.forEach(item => console.log(item));

Conditions

let x = 10; if (x > 5) { console.log("Big"); } else { console.log("Small"); }