how to turn number into string javascript

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

1
2var myNumber=120;
3var myString = myNumber.toString(); //converts number to string "120"

1var number = 12;
2return numner.toString();

1let a = '' + 50 // '50';

1const toNumber = str => +str;
2
3// Example
4toNumber('42');     // 42