1var obj = {a: "a", b: "b" /*...*/};
2var string = JSON.stringify(obj);
3// OUTPUT:
4// "{'a':'a', 'b':'b'}"

1var myNumber=120;
2var myString = myNumber.toString(); //converts number to string "120"

1num.toString();

1value.toString()
2String(value)
3value + ""

1var num = 15;
2var n = num.toString();

1<script type="text/javascript">
2    var num=213;
3    document.write("Output : " + num.toString(2));          
4</script>
5