Return Largest Numbers in Arrays seems like it should pass

Tell us what’s happening:
I checked this in CodePen and it returns the right answers for all of the arrays tested but for some reason it doesn’t pass. I can’t seem to figure out what I’m missing. Thanks as always.

Your code so far

function largestOfFour(arr) {
let newArr = [];
for (i = 0; i < arr.length; i++) {
return newArr;

largestOfFour([[4, 5, 1, 3], [13, 27, 18, 26], [32, 35, 37, 39], [1000, 1001, 857, 1]]);

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/78.0.3904.87 Safari/537.36.

Challenge: Return Largest Numbers in Arrays

Link to the challenge:

Make sure you always declare all variables before referencing them.

Wow, I always forget the ‘var’ to set the variable in a for loop. Sorry for the bother and thanks for the help!!