how to convert a number to a string in javascript

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

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

<script language="JavaScript" type="text/javascript"> 
var a = 3.3445;
var c = a.toString();
alert(c);
</script>
   

var number = 1212
var numberString = number.toString();//converts my number that is '1212' to a string

const toNumber = str => +str;

// Example
toNumber('42');     // 42