how to set the number of decimal places in javascript code example

Example 1: javascript show 2 decimal places

var myNumber=12.2345;
var myNumberWithTwoDecimalPlaces=parseFloat(myNumber).toFixed(2); //12.23

Example 2: javascript no decimal places

decimal.toFixed();
// return 6

decimal.toFixed(2)
// returns 5.68

decimal.toFixed(1)
// return 5.7