toFixed.js

/*
Javascript has a handy built-in Math.round(x) method that rounds a number to the nearest integer:

Math.round(3.14); // Returns 3
Math.round(17.43); // 17
Math.round(198.499); // 198
Math.round(200.5); // 201
Math.round(1784.76); // 1785
But that is sometimes not enough! What if we wanted to round 3.1415926535 to two decimal places? While some languages (such as PHP) has a round() function that supports rounding to a specified number of decimal places (e.g. <?php round(3.1415926535, 4); /* 3.1416 (rounded to 4 d.p. as specified) */ ?>), Javascript does not!

Task
Your task is to create a method, Math.roundTo(number, precision) which rounds a given number to precision decimal places.

You may find the following Math methods useful:

Math.round(x) (of course)
Math.pow(x,y) (returns x to the power of y - e.g. Math.pow(3,4) == 81)
*/

//Answer//

Math.roundTo = (number, precision) => Number(number.toFixed(precision));

//Or//

Math.roundTo = function (n, p) {
return (Math.round(Math.pow(10,p)*n))/Math.pow(10,p)
}