How to reverse list in Python?

Using Slicing

One of the simplest and most intuitive ways to reverse a list is by using slicing. You can reverse a list by specifying the slicing step as -1. Here's how you can do it:

my_list = [1, 2, 3, 4, 5]
reversed_list = my_list[::-1]
print(reversed_list)

Output:

[5, 4, 3, 2, 1]

This method creates a new reversed list, leaving the original list unchanged.

Using the reverse() Method

Python lists have a built-in method called reverse(), which reverses the elements of a list in place. Here's an example:

my_list = [1, 2, 3, 4, 5]
my_list.reverse()
print(my_list)

Output:

[5, 4, 3, 2, 1]

Using reverse() modifies the original list and does not create a new list.

Using the reversed() Function

Python provides a built-in function called reversed(), which returns a reverse iterator. You can convert this iterator to a list using the list() function:

my_list = [1, 2, 3, 4, 5]
reversed_list = list(reversed(my_list))
print(reversed_list)

Output:

[5, 4, 3, 2, 1]

This method also leaves the original list unchanged.

Using a For Loop (You don't need that probably)

You can reverse a list by iterating through it with a for loop and building a new list in reverse order. Here's how you can do it:

my_list = [1, 2, 3, 4, 5]
reversed_list = []
for item in my_list:
    reversed_list.insert(0, item)
print(reversed_list)

Output:

[5, 4, 3, 2, 1]
This method creates a new list and leaves the original list intact.