Rounding up a number to nearest multiple of 5

Question

Does anyone know how to round up a number to its nearest multiple of 5? I found an algorithm to round it to the nearest multiple of 10 but I can\'t find this one.

T

Answer 1

This Kotlin function rounds a given value 'x' to the closest multiple of 'n'

fun roundXN(x: Long, n: Long): Long {
    require(n > 0) { "n(${n}) is not greater than 0."}

    return if (x >= 0)
        ((x + (n / 2.0)) / n).toLong() * n
    else
        ((x - (n / 2.0)) / n).toLong() * n
}

fun main() {
    println(roundXN(121,4))
}

Output: 120