Meaning of 'var text = "";' - The For Loop

[Yvzslm]

Greetings!

 

I do not understand why I have to describe that variable " ".

http://www.w3schools.com/js/tryit.asp?filename=tryjs_loop_for_ex

 

When I put a letter in it, it returns "aThe number is 0 (...)" only the first character, not every loop.

So why we need to describe empty value. Why we want to write there nothing ->

 

[dsonesuk]

See what happens if you remove it, then you will know WHY it is required.

 

Its asking to join current value to previous.

[Ingolme]

That line of code creates the variable (reserves space in the computer's memory) and tells it to be a string with no content in it.

 

As dsonsuk said, try removing that line and see what shows up in the browser's Javascript console (most browsers let you access the console by pressing F12)