Contact manager in module 1 of js intermediate

Question

I am not sure whether, I can ask such questions or not. But I wrote a code in js for contact manager. It works fine. I am sharing my code here so that I can know that is there any alternative way to solve this? Or my code is perfect. I am just asking bcz I am a beginner and have some logical issues that takes more memory.
function contact(name, number) {
this.name = name;
this.number = number;
this.print = display
}
function display(name, number){
this.name = name+":";
console.log(this.name,number);
}
var a = new contact("David", 12345);
var b = new contact("Amy", 987654321);
a.print(a.name, a.number);
b.print(b.name, b.number);

Answer 1

Pay attention to white spaces in the output

Answer 2

class Contact {
constructor(name, number) {
this.name = name;
this.number = number;
}

print() {
console.log(this.name + ":" + this.number);
}
}

const david = new Contact("David", 12345);
const amy = new Contact("Amy", 987654321);

david.print();
amy.print();

Answer 3

Keep the right decision

Answer 4

What's the point?

Answer 5

ClickGames ,

First of all thanks for your help.

The point is:
In this code, output should be: there should be no whitespaces between name and colon

name: number