bits.ReverseBytes64() Function in Golang with Examples

Go language provides inbuilt support for bits to implement bit counting and manipulation functions for the predeclared unsigned integer types with the help of bits package. This package provides ReverseBytes64() function which is used to find the reversed order of the value of a. To access the ReverseBytes64() function you need to add a math/bits package in your program with the help of the import keyword.

Syntax:

func ReverseBytes64(a uint64) uint64

Parameters: This function takes one parameter of uint64 type, i.e., a.

Return Value: This function returns the value of a with its bits in reversed order.

Example 1 :

// Golang program to illustrate
// bits.ReverseBytes64() Function

package main

import (
    "fmt"
    "math/bits"
)

// Main function
func main() {

    // Finding the reverse order of a
    // Using ReverseBytes64() function
    a := bits.ReverseBytes64(7)
    fmt.Printf("Reverse order of %d: %b", 7, a)

}

Output:

Reverse order of 7: 11100000000000000000000000000000000000000000000000000000000

Example 2:

// Golang program to illustrate
// bits.ReverseBytes64() Function
package main

import (
    "fmt"
    "math/bits"
)

// Main function
func main() {

    // Finding the reverse order of a
    // Using ReverseBytes64() function
    a1 := bits.ReverseBytes64(3)
    fmt.Printf("ReverseBytes64(%064b) := %b\n", 3, a1)

    a2 := bits.ReverseBytes64(9)
    fmt.Printf("ReverseBytes64(%064b) := %b\n", 9, a2)

}

Output:

ReverseBytes64(0000000000000000000000000000000000000000000000000000000000000011) := 1100000000000000000000000000000000000000000000000000000000
ReverseBytes64(0000000000000000000000000000000000000000000000000000000000001001) := 100100000000000000000000000000000000000000000000000000000000