How to find the length of the longest consecutive zeroes in the binary representation of a number in Go

1 Answer

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package main

import (
    "fmt"
)

// longestConsecutiveZeroes returns the longest run of consecutive zeroes
// in the binary representation of an integer.
func longestConsecutiveZeroes(n int) int {
    maxCount := 0
    currentCount := 0

    for n > 0 {
        if (n & 1) == 0 { // Check if the least significant bit is 0
            currentCount++
            if currentCount > maxCount {
                maxCount = currentCount // Update maxCount
            }
        } else {
            currentCount = 0 // Reset count when a 1 is encountered
        }
        n >>= 1 // Right shift the number
    }

    return maxCount
}

func main() {
    num := 11298 // Binary: 0010110000100010
    
    fmt.Printf("Longest consecutive zeroes: %d\n", longestConsecutiveZeroes(num))
}



/*
run:

Longest consecutive zeroes: 4

*/

 



answered Sep 15, 2025 by avibootz
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