JS Loops

Question 1

How do you iterate through the keys of an object?

Answer 1

Use for…in loop

Question 2

What does the ++ increment operator do?

Answer 2

Increases the variable by 1:
If before variable > value gets incremented before
If after, value gets incremented after

Question 3

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

Answer 3

Break

Question 4

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

Answer 4

To return a true and false value, so the loops know when to run a code block.

Question 5

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

Answer 5

At the end of each iteration

Question 6

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

Answer 6

When loop starts and then ends

Question 7

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

Answer 7

In the beginning at the condition statement before code block is run

Question 8

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

Answer 8

Only happens one time, right in the beginning before anything happens.

Question 9

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

Answer 9

After initialization and before code block happens. When condition is met, code block will run.

Question 10

What is the purpose of a loop?

Answer 10

For repetition