How to round up to the nearest 100 in JavaScript

Question

I want to round up to the nearest 100 all the time whether or not the value is 101 or 199 it should round up to 200. For example:

var number = 1233; //use something like Math.round() to round up to always 1300 

I'd like to always round up to the nearest 100, never round down, using jQuery.

Answer 1

Use Math.ceil(), if you want to always round up:

Math.ceil(number/100)*100 

Answer 2

To round up and down to the nearest 100 use Math.round:

Math.round(number/100)*100 

round vs. ceil:

Math.round(60/100)*100 = 100 vs. Math.ceil(60/100)*100 = 100

Math.round(40/100)*100 = 0 vs. Math.ceil(40/100)*100 = 100

Math.round(-60/100)*100 = -100 vs. Math.ceil(-60/100)*100 = -0

Math.round(-40/100)*100 = -0 vs. Math.ceil(-40/100)*100 = -0