Question

How to round a number to the previous power of 2 in Kotlin

Answer 1

fun roundToPreviousPowerOf2(n: Int): Int {
    return if (n <= 0) 0 else 1 shl (31 - n.countLeadingZeroBits())
}

fun main() {
    val num = 21
    
    println("Previous power of 2: ${roundToPreviousPowerOf2(num)}")
}




/*
run:

Previous power of 2: 16

*/

 

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