What will happen if you use .insert(0, item) in a list?

Using .insert(0, item) on a list in Python means that the specified item will be added at the very start of the list. The method .insert() takes two arguments: the index at which to insert the item, which in this case is 0, and the item itself. By choosing 0, you are instructing Python to place the item before the first element of the current list, effectively placing it at the beginning.

This is particularly useful when you want to prioritize new elements ahead of existing ones in scenarios where the ordering of elements is significant. After executing this method, the original first element, along with all subsequent elements, are then shifted one index position to the right. Therefore, the new item will now occupy index 0, and everything else follows behind it.