[martinrame]

I don't understand something.

Why calling new Person(..,..) returns toString()?

The example calls:

console.log( 'Full name is:', new Person('Michael', 'Bluth2') );

new Person should create an instance of Person, but why it calls toString()?.

[bpicolo]

Because you're console.logging it

[DecoPerson]

"Every object has a toString() method that is automatically called when the object is to be represented as a text value or when an object is referred to in a manner in which a string is expected."

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Refe...