1console.log(JSON.stringify({ x: 5, y: 6 }));
2// expected output: "{"x":5,"y":6}"
3
4console.log(JSON.stringify([new Number(3), new String('false'), new Boolean(false)]));
5// expected output: "[3,"false",false]"
6
7console.log(JSON.stringify({ x: [10, undefined, function(){}, Symbol('')] }));
8// expected output: "{"x":[10,null,null,null]}"
9
10console.log(JSON.stringify(new Date(2006, 0, 2, 15, 4, 5)));
11// expected output: ""2006-01-02T15:04:05.000Z""

1var person={"first_name":"Tony","last_name":"Hawk","age":31};
2var personJSONString=JSON.stringify(person);