Why constructor property return this way?

Question

(123).constructor //return function Number(){[native code]}
but typeof(123) //return number
I know difference between typeof operator and constructor property but don't understand why the output is like that?!!

Answer 1

1. Constructor is function, (123) belongs to Number class, and (123).constructor is referring to the constructor function of Number.

https://www.sololearn.com/learn/JavaScript/2979/

2. Number is a class. You can use new keyword to create instance of class. Just adding parathesis is calling its constructor function to execute, but the memory is not allocated for a new instance of it.

Answer 2

Thanks all of you ☺

Answer 3

As Gordon said, it refers to the function Number, thus function Number(){[native code]}.
You can create a number in these ways, may be more but this is some of the basic ways:
new Number(123)
Number(123)
(123)
123

You can easily use operators like +, - and so on easily on all these like,
Number(10)+20 //output 30

Number sure is a class, therefore it has a constructor making the use of the new keyword possible, but it is not required by any means - same applies to the Date class etc.

And finally, leaving the Number function empty will return 0.

Answer 4

as Gordon

Answer 5

thank you all

Answer 6

you can easily operators

Answer 7

may be it was due to the difference in the member class