Javascript using prototype how can I set the value of “this” for a number?

Question

So if we can get past the \"should you?\" question ... does anyone know how to set the value of an integer in prototype?

Answer 1

JavaScript has both number primitives and Number objects. Number primitives are immutable (like all primitives in JavaScript). The numeric value of a Number object is also immutable. So your add method can only return the updated value. You can create your own number-like object, of course, with a mutable value.

Details about number immutability and your own number object in this other answer (didn't realize that question was a duplicate when answering it).