how to convert to string javascript

1num.toString();

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

1function myFunction() {
2  var x1 = Boolean(0);
3  var x2 = Boolean(1);
4  var x3 = new Date();
5  var x4 = "12345";
6  var x5 = 12345;
7
8  
9  console.log(String(x1))
10  console.log(String(x2))
11  console.log(String(x3))
12  console.log(String(x4))
13  console.log(String(x5))
14
15}
16
17//outputs the following: 
18
19false
20true
21Wed Dec 30 2020 20:35:17 GMT-0500 (Eastern Standard Time)
2212345
2312345
24

1`String text ${expression}`
2

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