Is there an efficient way to round a float to the nearest hundredths place in swift?

Question

I would like to round a float in swift but everything I have found tells you to convert it in a string. Is there a way to convert the float itself?

Example: 14.14910001 -> 14.15

Answer 1

You can use round() with a "scale factor" of 100:

let x = 14.14910001
let y = round(100.0 * x) / 100.0
println(y) // 14.15

But you should note that a binary floating number cannot represent a number like 14.15 exactly, so this will give the nearest Double approximation of 14.15.