JAVASCRIPT

Round to 2 decimal places

function roundToTwo(num) {
    return +(Math.round(num + "e+2")  + "e-2");
}
console.log(roundToTwo(2.005));

rounding to two decimal places

var numb= 212421434.533423131231;
var rounded = Math.round((numb + Number.EPSILON) * 100) / 100;
console.log(rounded);

round to 2 decimal places

a = 2.154327
a_2_decimal = "{:.2f}".format(a)