Push method in javascript array

The push() method in JavaScript is used to add one or more elements to the end of an array. This method is mutating, meaning it modifies the original array instead of creating a new one. It is commonly used when new elements need to be dynamically inserted at the end of an existing array. The push() method accepts any number of elements as arguments, allowing multiple values to be added in a single operation.

One important characteristic of push() is that it returns the new length of the array after adding the elements. This can be useful when tracking changes in array size or when iterating through dynamically expanding lists. Since it alters the original array, it should be used cautiously when working with immutable data structures or functional programming principles.

The push() method works with all data types, including numbers, strings, objects, and even other arrays. It is widely used in JavaScript for handling lists, stacks, and dynamically growing datasets. However, if a non-mutating approach is needed, alternatives like the spread operator or concat() should be considered. Understanding how push() modifies arrays is essential for effective JavaScript development, especially when dealing with dynamic data and real-time applications.