JavaScript Tutorial for Beginners - 12 - Loops Part 2

Loops in Javascript.

[powderberrykun]

Finally I understand for loops!!! Until now, I've always found them to be super confusing for some reason!!

[leandrodossantos]

Hey EJ
hows it going there?
congrats on the great tutorials you make
I have been going thru all over the internet to find a clear JS tutorial.
Yours are truly clear and simpe to understand.
keep up the good work!

[djpro]

And finally, for the first time.The secret technique have been solved to my brain that make my brain goes in loops for days :)

[Monkeyradar]

Thanks for keeping up the good work. JavaScript's syntax is a lot like the one used in C (a programming language I know) and you've managed to point out certain aspects of "for" loops that I never really noticed. For example, being more convenient if the code within the loop is really long.

[gmc]

I like the following explanation much better:

A for loop is used when you know how many times you will be going through the loop. A while loop is for when you want to keep looping until a condition changes.

[megalegendyt]

Hello, I am learning HTML, CSS, JAVASCRIPT from you, you are doing a great job! A great Teacher!, I wish is to, please reveal your face...I wanna see that how the best teacher of coding in youtube looks like?

[Ryan-fldz]

THANK YOU SO MUCH! You deserve way more likes and subscribers.

[duncanmcdonald]

Another reason for using the for(...){} syntax over the while(...){} syntax in the example is because of something called "scope". The "scope" of a value means the parts of the code that can use a value.

for (var i = 1; i < 5; i++)
{
only code in here can see and use i
}

code here can not see or use i.


where as:


var i = 1;
while(i < 5)
{
code here can see and use i
}

code here can also see and use i, and will use the value that i has when the loop has finished (in the case of the example this is 5).

[bablugope]

mind blowing
whats a technique to explain

[har_h]

can i reuse the "var i" from the loop at a different place as a variable?

[kleozane]

Hello +EJ Media, what screen recorder do you use ?? Because my pc is really slow and i'll look if your screen recorder works with my horrible PC !!!!

[inafridge]

are their any slight differences or did the java people just develop two commands that do the same thing

[ammarsadeq]

u should have mentioned that in javascript u commented out the while loop using /* & */ at the beginning and at the end respectively. Is this a way to comment out anything in JavaScript

[tastyl]

if u want it run 5 times u can do
for(var i = 0; i < 5; i++)
then ur code

[yogeshsingh]

hey man can you show us how to use javascript in websites