JavaScript Loops

Question 1

What is the purpose of a loop?

Answer 1

It is used typically for running code a number of times

Question 2

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

Answer 2

It acts as a counter to how many times a loop is run

Question 3

What does ‘iteration’ mean in the context of loops?

Answer 3

It is similar to how many times a loop has run

Question 4

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

Answer 4

At the start of the loop

Question 5

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

Answer 5

At the start of the loop

Question 6

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

Answer 6

After the initialization and then at the start of every following loop

Question 7

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

Answer 7

After the code block and before the start of the loop

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

A break statement

Question 9

What does the ++ increment operator do?

Answer 9

It increases the count by one for whatever it is attached to

Question 10

How do you iterate through the keys of an object?

Answer 10

Using a for…in loop