Loops

Question 1

What is the purpose of a loop?

Answer 1

Allow you to repeat a process over and over without having to write the same (potentially long) instructions each time you want your program to perform a task.

Question 2

What is the purpose of a condition expression in a loop?

Answer 2

an expression that is tested each time the loop repeats (on/off switch)

Question 3

What does “iteration” mean in the context of loops?

Answer 3

One completed execution of the code in a loop

Question 4

When does the condition expression of a while loop get evaluated?

Answer 4

Before the executing statement.

Question 5

When does the initialization expression of a for loop get evaluated?

Answer 5

Executed one time before the code block

Question 6

When does the condition expression of a for loop get evaluated?

Answer 6

After the initialization and after each loop

Question 7

When does the final expression of a for loop get evaluated?

Question 8

Besides a return statement, which exits its entire function block, which keyword exits a loop before its condition expression evaluates to false?

Answer 8

Break

Question 9

What does the ++ increment operator do?

Answer 9

Adds one a value

Question 10

How do you iterate through the keys of an object?

Answer 10

Use the for in loop