How to delete the last element in a list in Python?

In Python, there are several ways to delete the last element from the list.

One way is to use the pop() method. This method removes the last element of a list by default, or you can specify the index of the element you want to remove.

For example:

Output:

[1, 2, 3, 4]

Another way to delete the last element of a list is to use negative indexing. In Python, you can use negative indexing to access elements from the end of a list. For example, the last element of a list can be accessed using the index -1, the second-to-last element can be accessed using -2, and so on.The del statement is used to delete a specific element from a list, and when used in combination with negative indexing. To delete the last element of a list, you can use the following code:

For example:

Output:

[1, 2, 3, 4]

You can also use slicing to remove the last element from a list. The following code removes the last element from a list by creating a new list that excludes the last element:

For example:

Output:

[1, 2, 3, 4]

You can also use the remove() method, which removes the first occurrence of a specified value in a list.

For example:

Output:

[1, 2, 3, 4]

A final way is to use list comprehension, which is an elegant and concise way to create new lists based on existing lists. The following code creates a new list that contains all elements of the original list except the last one:

For example:

Output:

[1, 2, 3, 4]

It is worth noting that all the above methods change the original list, and none return a new list. If you want to keep the original list and create a new one, you can use the slicing method or list comprehension.

All these methods will remove the last element from the list, but they differ in how they are implemented and the additional functionality they provide. Some methods, like pop(), can also return the removed element, while others, like del, do not return anything.

You can use the pop() method with a specific index to remove an element from the middle of a list, or you can use the remove() method with a specific value to remove all occurrences of that value from the list.

When using negative indexing, removing multiple elements from the end of the list is possible by specifying a negative index greater than -1.

For example, the following code removes the last two elements of a list.

Output:

[1, 2, 3]

If you want to remove all elements of the list, you can use the clear() method, which removes all items from the list.

For example:

Output:

[]