​

var age = 50;

​

function changeAgeNatif(age) { 

  age++; 

}

changeAgeNatif(age);

console.log(age);

​

​

function Person(age) {

    this.age = age;

}

​

var denis = new Person(50);

​

function changeAgeObject(person) {

  person.age++; 

}

​

changeAgeObject(denis);

console.log(denis.age);

​