Array.length: Why 2 instead of 3?

Question

I found this quiz question:

var arr = [];
arr[0] = "x";
arr[1] = "y";
arr.key = "c";

console.log(arr.length)
// 2

Answer 1

Martin Taylor
Thank you! I’ve changed the code as you suggested :

(null)
{"0":"x","1":"y","key":"c"}

https://code.sololearn.com/WDfnN326rhKu/?ref=app

Answer 2

Martin Taylor Thank you so much for correcting me.