Someone help me to find the problem?

Question

function contact(name,number)
{this.name=name;
this.number=number;
this.print=function(){
console.log(this.name+":"+this.number);}
}
var a=new contact("David",12345);
var b=new contact("Amy",987654321)
a.print();
b.print();

Answer 1

What's the problem?
Completely working code.

Answer 2

i don't now
Because the result is ERROR

Answer 3

I thing the problem in ":"

Answer 4

What are you testing this code on?
This works in SoloLearn.
Because of ":" there can be no problems.
The only thing that you did not do was put a punctuation mark at the end of the assignment to the variable "b".