javascript numbers- immutable

Question

I come from c# background where immutable is achieved with public get ,private set properties. I have read that numbers in javascript are immutable so how can I do the following

var x = 6 / 2;
console.log(x);  // 3
 x = 8;
console.log(x); // 8

I have changed x, which I thought I couldn't?

Answer 1

The numbers themselves are immutable. The references to them that are stored in the variable are not.

So 6 / 2 gets you a reference to the immutable 3, and then = 8 assigns a new reference to the immutable 8.