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JavaScript JavaScript Loops, Arrays and Objects Simplify Repetitive Tasks with Loops For Loops

Niall Maher
Niall Maher
16,985 Points
Posted by Niall Maher
Niall Maher
16,985 Points

For loop theory help

first here's my code;

var html = "";

for (var i = 1; i <= 10; i += 1) {
  html += "<div>" + i + "</div>";
}
document.write(html);

What i don' understand is why the document.write(html) prints the counter each time and it's outside the loop (or at least it looks like it to me) when I run the code I get 10 divs but I only expect one?

1 Answer

Geoff Parsons
Geoff Parsons
11,679 Points

You're adding to the html variable each iteration of the loop. By the end of the loop html contains 10 divs with a count in them and then you write them all at once with the document.write call after the end of the loop.

Niall Maher
Niall Maher
16,985 Points
Niall Maher
Niall Maher
16,985 Points

Aaaah penny drops thank you sir :) It's always the simplest things I miss,

thanks a million!