Question

Assume you have a list of numbers such as a_list= [1,2,3,4,5]

what would the value of num be after the following code?
A. num=a_list.pop()
B. num= a_list.append(10)
C. num=_list.pop()

Answer 1

The value of num would be 5 after num=a_list.pop(), None after num= a_list.append(10), and would result in a NameError for num=_list.pop() if _list is not defined.

Step-by-step explanation:

If you have a list of numbers such as a_list= [1,2,3,4,5], and you execute the code provided, the value of num depends on which line of code is executed:

• A. num=a_list.pop(): The pop() method will remove the last item in the list and return it. Here, num will be 5, and a_list will then be [1, 2, 3, 4].
• B. num= a_list.append(10): The append() method adds an item to the end of the list and returns None. Here, num will be None, and a_list will be [1, 2, 3, 4, 5, 10].
• C. num=_list.pop(): This line has a typo. If the variable is meant to be a_list instead of _list, the result would be the same as option A, but if _list is an undefined variable, it will result in a NameError.