JavaScript: Reverse a Binary string

Last update on April 24 2023 07:04:05 (UTC/GMT +8 hours)

JavaScript String: Exercise-64 with Solution

Write a JavaScript function that takes a positive integer and reverses the binary representation of that integer. Finally return the decimal version of the binary string.
Test Data:
(100) -> 19
Explanation:
Binary representation of 100 is 1100100
Reverse of 1100100 is 10011
Decimal form of 10011 is 19
(1134) -> 945
Explanation:
Binary representation of 1134 is 10001101110
Reverse of 10001101110 is 1110110001
Decimal form of 1110110001 is 945

Sample Solution:

HTML Code:

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>JavaScript function to Reverse a Binary string</title>
</head>
<body>

</body>
</html>

JavaScript Code:

function test(n) {
	return parseInt(n.toString(2).split('').reverse().join(''), 2);
}
console.log(test(100));
console.log(test(1134));

Sample Output:

19
945

Flowchart:

Live Demo:

See the Pen javascript-string-exercise-64 by w3resource (@w3resource) on CodePen.

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