What is the purpose of an array in programming?

An array in programming is a data structure that stores a collection of elements of the same type in a contiguous block of memory. The main purpose of an array is to provide quick access to elements by index.

Arrays allow efficient storage and processing of collections of data, such as lists of numbers, characters, or objects. Thanks to indexing, any element can be quickly retrieved or modified.

Example of an array in JavaScript (Node.js):

const numbers = [10, 20, 30, 40];
console.log(numbers[2]); // Will output 30

Here, numbers is an array of four elements, accessed by index.