Which operation does the method .append() perform on a list?

Which operation does the method .append() perform on a list?

• A. Removes an item
• B. Adds an item to the end
• C. Sorts the items
• D. Finds an item in the list

Answer: (B)

The method .append() performs the operation of adding an item to the end of a list in Python. When you invoke this method on a list, it modifies the list in place by adding the specified element as the last item. This is an essential function for dynamically building lists, allowing for the progressive addition of elements as needed. For example, if you have a list called `fruits` and you use `fruits.append('banana')`, the string 'banana' will become the last element of the `fruits` list. Therefore, the ability of .append() to add items is critical for managing lists within Python, especially when handling collections of data whose size might change during the course of a program's execution.

The method .append() performs the operation of adding an item to the end of a list in Python. When you invoke this method on a list, it modifies the list in place by adding the specified element as the last item. This is an essential function for dynamically building lists, allowing for the progressive addition of elements as needed.

For example, if you have a list called fruits and you use fruits.append('banana'), the string 'banana' will become the last element of the fruits list. Therefore, the ability of .append() to add items is critical for managing lists within Python, especially when handling collections of data whose size might change during the course of a program's execution.