How can I round down a number in Javascript?

Question

How can I round down a number in JavaScript?

math.round() doesn\'t work because it rounds it to the nearest decimal.

I\'m not sure if there is

Answer 1

Round towards negative infinity - Math.floor()

+3.5 => +3.0
-3.5 => -4.0

Round towards zero - usually called Truncate(), but not supported by JavaScript - can be emulated by using Math.ceil() for negative numbers and Math.floor() for positive numbers.

+3.5 => +3.0 using Math.floor()
-3.5 => -3.0 using Math.ceil()