Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
Golang Program to check whether given positive number is power of 2 or not, without using any branching or loop
Examples
Consider n = 16(00010000)
Now find x = n-1 => 15(00001111) => x & n => 0
Approach to solve this problem
Step 1 − Define a method, where n and is an argument, returns type is int.
Step 2 − Perform x = n & n-1.
Step 3 − If x is 0, then the given number is power of 2; else not.
Example
package main
import (
"fmt"
"strconv"
)
func CheckNumberPowerOfTwo(n int) int {
return n & (n-1)
}
func main(){
var n = 16
fmt.Printf("Binary of %d is: %s.\n", n, strconv.FormatInt(int64(n), 2))
flag := CheckNumberPowerOfTwo(n)
if flag == 0{
fmt.Printf("Given %d number is the power of 2.\n", n)
} else {
fmt.Printf("Given %d number is not the power of 2.\n", n)
}
}Output
Binary of 16 is: 10000. Given 16 number is the power of 2.
Updated on: 17-Mar-2021
431 Views
Advertisements