What is the time complexity of inserting an element at the end of an array?

What is the time complexity of inserting an element at the end of an array?

The time complexity of inserting an element at the end of an array is O(1), which is also known as constant time complexity.

In an array, elements are stored in contiguous memory locations. When inserting an element at the end of the array, there is no need to shift or move any existing elements. The new element can simply be placed at the next available index, which is the end of the array. This operation takes a constant amount of time, regardless of the size of the array.

Therefore, the time complexity of inserting an element at the end of an array is constant, O(1).