number of digits in number javascript code example

Example 1: javascript round to 2 digits

var num = 2;
var roundedString = num.toFixed(2);// 2.00

Example 2: get the whole value of a number javascript

var value = 2.9802453587962963;
var wholeNum = Math.floor(value);
console.log(wholeNum);  // output ==> 2