📚 JavaScript Arrays Tutorial

Arrays in JavaScript let you store multiple values in a single variable. They are one of the most used data structures in JS — super handy for lists, collections, and sequences.

🔤 Example: Declaring and Accessing Arrays

📚 Array Methods Example

🔧 Common Array Methods Cheat Sheet

• push() — Adds an element to the end
• pop() — Removes the last element
• shift() — Removes the first element
• unshift() — Adds an element at the start
• slice(start, end) — Returns a section of the array
• splice(start, deleteCount) — Adds/Removes elements
• forEach(callback) — Loops through each element
• map(callback) — Creates a new array with modified items

🧮 Example: Using map() to Modify Arrays

⚡ Quick Tips

• Arrays can hold any data type — numbers, strings, objects, even other arrays.
• Use length property to get array size: array.length
• Arrays are dynamic in JS — no need to declare a fixed size.
• Immutable methods like map() and filter() return new arrays.