dividing an Int by an Int rounds down, that's grea...

# getting-started

[Bernhard]

dividing an Int by an Int rounds down, that's great and all, but how do you round up (e.g. 5/3 == 2)

[ephemient]

it doesn't round down, it rounds towards zero: (-5)/3==-1 not -2

[hho]

Math.ceil(5.toDouble() / 3).toInt() ?

[ephemient]

if you're only concerned about positive numbers then just add the denominator minus one to the numerator first

[ephemient]

(5+3-1)/3

[Sam]

https://youtrack.jetbrains.com/issue/KT-54264

[Bernhard]

thanks

[Bernhard]

Python has / and // for integer and float division, was expecting something similar but Math.ceil() methods return floats

[ephemient]

Python isn't typed, so / means "float division regardless of types" and // means "integer division regardless of types".
Kotlin is typed, so / means "float division" on floats and "integer division" on ints.

[ephemient]

kotlin.math.ceil(Double) has to return a Double because its range is larger than a Long can contain (not a concern in Python since it has an arbitrary-precision integer falllback, but that has a cost throughout the rest of the language runtime)