Create Strings using Template Literals question about the purpose of .length in this assignment

Tell us what’s happening:
Describe your issue in detail here. I was just wondering what for (let i =0; i<arr.length; i++)
does in the code what is it’s purpose? Thank you

  **Your code so far**

const result = {
success: ["max-length", "no-amd", "prefer-arrow-functions"],
failure: ["no-var", "var-on-top", "linebreak"],
skipped: ["no-extra-semi", "no-dup-keys"]
function makeList(arr) {
// Only change code below this line
const failureItems = [];
for(let i = 0; i <arr.length; i++ ){
  failureItems.push(`<li class="text=warning">${arr[i]}`)
// Only change code above this line

return failureItems;

const failuresList = makeList(result.failure);
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Challenge: Create Strings using Template Literals

Link to the challenge:

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