I am practicing html javascript. At chapter about array, I use the syntax:

Question

var arr = new Array(5); for (var i=0; i<arr.length; i++) arr[i] = i; for (var i=0; i<arr.length; i++) document.writeln(i + " " + arr[i]);

The problem is, the output can not displayed or viewed. What is the problem with my code? Thank you class & sololearn team.

Answer 1

works fine for me though ....

you could try using console.log or document.body.innerHTML+= i + " " + arr[i]

Answer 2

I see. But what is the different between the three console.log, document.body.innerHTML and document.write? The last comment document.write is even more looks like C# command.