Length

The length is not a method but a built-in property of arrays in JavaScript. It represents the number of elements currently present in the array. It's a non-negative integer value that is always one more than the highest valid index within the array.

The primary use case is to determine the number of items in an array. This is crucial for iterating through the array using loops (e.g., for, while), accessing specific elements by index, and performing operations that require knowledge of the array's size. For example :

const fruits = ["apple", "banana", "orange"];

// Accessing array length
const numberOfFruits = fruits.length;

console.log(numberOfFruits); // Output: 3

The array "fruits" contains three items. Therefore, when accessing the length of an array, the length will be 3.