Javascript-loops

Question 1

What is the purpose of a loop?

Answer 1

1. To allow something do multiple times –> repeat.

Question 2

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

Answer 2

1. to see if the code should stop.

Question 3

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

Answer 3

1. when the code runs from { to } –> that is 1st iteration.

Question 4

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

Answer 4

1. Before anything happens
2. if that happens it goes into iteration of the code.
3. then it gets checked again.

Question 5

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

Answer 5

1. happens before anything and it only happens 1 time.

Question 6

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

Answer 6

1. after initialization and after incrementation.

Question 7

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

Answer 7

1. At the end of the iteration

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

1. break.

Question 9

What does the ++ increment operator do?

Answer 9

2. it increases the value of the variable. (loops do one value past the stop value to check if it needs to be stopped).

Question 10

How do you iterate through the keys of an object?

Answer 10

For in loop