const obj = {
id: 900371,
name: "R2D2",
academicrank: "Dr",
hobbies: ['movies', 'reading', 'coding']
};
obj.gender = 'male'
console.log(obj);
/*
run:
{
"id": 900371,
"name": "R2D2",
"academicrank": "Dr",
"hobbies": [
"movies",
"reading",
"coding"
],
"gender": "male"
}
*/