JavaScript Arrays

An array is a data structure used to store multiple values in a single variable. Instead of creating separate variables for related data, arrays allow grouping values together in an ordered list. Arrays are widely used to store collections such as user lists, product data, scores, and more.

Arrays help:

• Manage large amounts of related data
• Reduce code repetition
• Improve data organization
• Enable efficient data processing

In real-world applications, arrays are everywhere—from displaying products on an e-commerce site to handling API responses.

Arrays are created using square brackets [].

Array elements are accessed using their index number, starting from 0.

Explanation: The first element is always at index 0, not 1.

You can update an array element by assigning a new value to a specific index.

The length property returns the total number of elements in an array.

push()

Adds an element to the end of an array.

pop()

Removes the last element from an array.

shift()

Removes the first element from an array.

unshift()

Adds an element to the beginning of an array.

Arrays are commonly processed using loops.

rrays are used for:

• Displaying lists (users, products, posts)
• Processing API responses
• Managing form inputs
• Handling game scores or rankings