JavaScript Loops Worksheet

Questions

Question 1

What is the difference between a while loop and a for loop?

A while loop runs if the condition is true. A for has to have a counter, condition and a update all in one line.

Question 2

What is an iteration?

A loop that is complete and passes through.

Question 3

What is the meaning of the current element in a loop?

Where the item processed during the current loop.

Question 4

What is a 'counter variable'?

A variable the tracks all the loops that runs.

Question 5

What does the break; statement do when used inside a loop?

It would stop the loop.

Question 6

Explain what the following code is doing (if you would like to run this code, you can paste it into the SCRIPT element in the page):


		const allH4elements = document.getElementsByTagName("h4");
		for(let x = 0; x < allH4elements.length; x++){
			console.log(allH4elements[x].innerHTML);
		}

It would get all the h4 elements and logs inside each console page.

Coding Problems

Coding Problems - See the 'script' tag below this h3 tag. You will have to write some JavaScript code in it.

Always test your work! Check the console log to make sure there are no errors.