Question

How to round a number to the next power of 2 in Go

Answer 1

package main

import (
    "fmt"
    "math"
)

// RoundToNextPowerOf2 returns the next power of 2 greater than or equal to n.
func RoundToNextPowerOf2(n uint) uint {
    if n == 0 {
        return 1
    }
    exp := math.Ceil(math.Log2(float64(n)))
    
    return uint(math.Pow(2, exp))
}

func main() {
    num := uint(21)
    
    fmt.Printf("Next power of 2: %d\n", RoundToNextPowerOf2(num))
}



/*
run:
 
Next power of 2: 32
 
*/

 

70+ SQL courses for beginners and professionals