Question

By default the floor function always rounds down and the ceil function always rounds up to the nearest ‘1’

How would I round down/up to the nearest 20, or the nearest 1,000?

Say I had a number x and a factor y.

I want to find the closest factor of y to x.

I am using this to find maximum and minimum values for a graph. Thanks.

Answer 1

Simple:

var z = y * Math.floor(x / y);