javascript-loops

Question 1

What is the purpose of a loop?

Answer 1

To execute code a certain number of times

Question 2

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

Answer 2

It is an expression to be evaluated before each loop iteration.

Question 3

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

Answer 3

Number of times the code executes

Question 4

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

Answer 4

The condition is evaluated before executing the statement

Question 5

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

Answer 5

Once before the execution of the code block

Question 6

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

Answer 6

If the condition is true, it is executed. Test is optional. If false, execution skips to the first expression following the for construct.

Question 7

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

Answer 7

An expression to be evaluated at the end of each loop iteration. Before the next evaluation of condition.

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

Condition statement

Question 9

What does the ++ increment operator do?

Answer 9

Increments by one

Question 10

How do you iterate through the keys of an object?

Answer 10

Use a for - in loop