Description The length property sets or returns the number of elements in an array.

Jul 10, 2025 · The length data property of an Array instance represents the number of elements in that array. The value is an unsigned, 32-bit integer that is always numerically greater than the highest …

The length property returns the number of elements of a dense array. For spare arrays, the length property doesn’t reflect the number of elements. Modifying the length property may remove elements …

Feb 1, 2024 · The length of an array tells us how many elements are present in the array. You can use this to check if an array is empty and, if not, iterate through the elements in it.

Jul 23, 2025 · To get the size (or length) of an array in JavaScript, we can use array.length property. The size of array refers to the number of elements present in that array.

May 1, 2025 · You can access the length of an array by using the dot notation on an array instance. For example, if you have an array named myArray, you can get its length by simply writing myArray.length.

Feb 5, 2025 · A comprehensive guide to the JavaScript Array length property, covering how to get, set, and manipulate array sizes dynamically.

Dec 10, 2024 · As a JavaScript developer with over 15 years of experience, I often get asked – what exactly does that .length property on arrays do? In this comprehensive guide, we‘ll cover everything …

Nov 3, 2025 · JavaScript arrays are dynamic and allow for "empty slots" (gaps), where positions exist in the array but have no assigned values. This quirk means array.length can be misleading—it …

Sep 19, 2025 · Use the length property to get the number of elements in an array. The length property returns the number of elements in the array as an integer. In this example, fruits.length returns 3 …