JavaScript Interview Question #37

What is an array in JavaScript?

Objects, Arrays & Core Data Handling Junior Beginner

Quick Interview Answer

An array is an ordered, zero-indexed collection designed to store multiple values. JavaScript arrays are objects with special behavior for integer-like indexes and a length property.

Detailed Explanation

An array is an ordered, zero-indexed collection designed to store multiple values. JavaScript arrays are objects with special behavior for integer-like indexes and a length property.

Arrays can contain values of different types, although application code often keeps elements conceptually consistent. JavaScript provides many array methods for searching, transforming, filtering, sorting, and aggregating data.

Code Example

const technologies = [
    "JavaScript",
    "C#",
    "SQL"
];

console.log(technologies[0]); // JavaScript
console.log(technologies.length); // 3