COMP 110 QUIZ 02 V2

.append()

Adds an item to the end of the list. It modifies the list in place.

.pop(index)

Removes and returns the element at the given index.

len() for a list

The number of elements currently in the list.

while loop

A control flow structure that repeatedly executes a block of code as long as its condition evaluates to True.

repeat block in a while loop

The indented code that runs over and over while the condition is True.

What is the purpose of a while loop?

To repeatedly execute code as long as a condition is True.

What causes an infinite loop?

A loop condition that never becomes False.

How do you prevent an infinite loop?

Update a variable involved in the condition each iteration to move toward False.

What is variable declaration/definition?

Connecting a name to a type and reserving space in memory.

What is variable assignment?

Giving a value to a variable name.

What is variable initialization?

The first time a variable is assigned a value.

What is variable access?

Using a variable's value in an expression.

What error occurs when accessing an uninitialized variable inside a function?

UnboundLocalError

What error occurs if a variable was never declared?

NameError

In x = y, which side is evaluated first?

The right-hand side (y) is evaluated, then assigned to x.

What should the sum_to_zero(i) function do?

Use a while loop to add numbers from 0 to i and return the total.

What should the sum_ints(my_list) function do?

Use a loop to sum all numbers in my_list and return the result.

How do you declare a list of integers?

my_list: list[int].

How do you create an empty list?

With [] or list().

How do you access an item in a list?

Use subscription notation: my_list[index].

How do you assign a new value to a specific index in a list?

my_list[index] = new_value.

What does .append(item) do?

Adds item to the end of the list.

What does .pop(index) do?

Removes and returns the item at that index.

What does del my_list[index] do?

Deletes the item at that index without returning it.

What does len(my_list) return?

The number of items currently in the list.