js convert object to string

var obj = {a: "a", b: "b" /*...*/};
var string = JSON.stringify(obj);
// OUTPUT:
// "{'a':'a', 'b':'b'}"num.toString();var person={"first_name":"Tony","last_name":"Hawk","age":31};
var personJSONString=JSON.stringify(person); String(yourobject); //r