JavaScript Reverse the order of the bits in a given integer

We are required to write a JavaScript program that reverses the order of the bits in a given integer.

For example −

56 -> 111000
after reverse 7 -> 111

Another example,

234 -> 11101010
after reverse 87 -> 1010111

Example

const num1 = 789;
const num = 43
const reverseBits = (num = 1) => {
   const str = num.toString(2);
   const arr = str.split('').reverse();
   const arrStr = arr.join('');
   const reversedNum = parseInt(arrStr, 2);
   return reversedNum;
}
console.log(reverseBits(num));
console.log(reverseBits(num1));

Output

And the output in the console will be −

53
675

AmitDiwan

Updated on: 21-Nov-2020

190 Views

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