Append an integer
Input
append_value([1, 2], 3)
Output
[1, 2, 3]
The function appends 3 to the provided list and returns the list with the new element.
Full lesson preview
Write a function that modifies a passed list
Practice modifying a list passed into a function (in-place) and returning the updated list.
Python practice8 minFunctions & ScopeBeginnerLast updated March 17, 2026
Problem statement
Write a function named append_value(lst, value) that takes a list lst and a value value, appends value to lst (modifying the original list), and returns the same list object with the new element added. Do not create and return a new list — modify the provided list in place.
Task
Implement a function that appends a value to a list argument, modifying it in-place and returning the modified list.
Examples
Input format
A list (lst) and a single value (value) to append.
Output format
Return the same list with the new value appended (the printed representation of the list).
Constraints
Do not create a new list; modify lst in place and return it. The list can contain elements of any type.
Samples
Sample 1
Input
append_value(['a'], 'b')
Output
['a', 'b']
The value 'b' is appended to the existing list.