Reversing the bits of a decimal number and returning new decimal number in JavaScript

Problem

We are required to write a JavaScript function that takes in a decimal number, converts it into binary and reverses its 1 bit to 0 and 0 to 1 and returns the decimal equivalent of new binary thus formed.

Example

Following is the code −

 Live Demo

const num = 45657; const reverseBitsAndConvert = (num = 1) => {    const binary = num.toString(2);    let newBinary = '';    for(let i = 0; i < binary.length; i++){       const bit = binary[i];       newBinary += bit === '1' ? '0' : 1;    };    const decimal = parseInt(newBinary, 2);    return decimal; }; console.log(reverseBitsAndConvert(num));

Output

19878