![Trending Articles on Technical and Non Technical topics](/images/trending_categories.jpeg)
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
Rounding off numbers to some nearest power in JavaScript
We are required to write a JavaScript function that takes in a number and returns a number that can be represented as a power of 2 which is nearest to the input number.
For example: If the input number if 145.
Then the output should be 128 because 145 is the nearest such number to 128 which can be represented as 2^n for some whole number value of n.
Example
The code for this will be −
const num = 145; const nearestPowerOfTwo = num => { // dealing only with non negative numbers if(num < 0){ num *= -1; } let base = 1; while(base < num){ if(num - base < Math.floor(base / 2)){ return base; }; base *= 2; }; return base; }; console.log(nearestPowerOfTwo(num));
Output
The output in the console −
128
Advertisements