return 2016-this.age; what's - doing there?

Answer 1

I think it will return date of birth:
2016 - 26 = 1990

Assuming age is 26.

Answer 2

return, it will return specified value after return.
this.age, get value property (age) from current constructor.

For example : this.age = 1990;
The code will return the result of
2016 - 1990 = 26

So, it will return 26

Answer 3

got this tnxs fellows

Answer 4

boa noite