How to get the value of an object property by using a variable

Question

Here is code I have

var person ={
  name: 'John'
};
var v = 'name';

console.log(person.name); // John
console.log(person.v);    // undefined
console.log(v in person); // true

As you can see in the code, person.v returns undefined.

I'd like to know if it is possible to print 'John' using variable v.

Answer 1

use this:

 var person ={
      name: 'John'
    };
    var v = 'name';

    console.log(person.name); // John
    console.log(person[v]);    //john

Answer 2

person[v] should work in this situation