JS Array a['1'] doesnot gives an error

Question

I have declared an array a = [1,2,3,4,5]

When I write a[1] it returns 2 which is perfectly fine but when I write a[\'1\']

Answer 1

First of all, array is also object having property names as 0,1,2,....n

Property names must be strings. This means that non-string objects cannot be used as keys in the object. Any non-string object, including a number, is typecasted into a string via the toString method. [Ref]