# JavaScript - Position of the rightmost set bit of a number

## JavaScript Bit Manipulation: Exercise-12 with Solution

Write a JavaScript program to find the position of the rightmost set bit of a given number. The number 1 represents the set bits in a binary number.

**Test Data:**

(34) -> 2

Explanation:

34 in binary is 100010

Set bits in the 2^{nd} position of the said binary format.

(104) -> 4

Explanation:

104 in binary is 1101000

Set bits in the 4^{th} position of the said binary format.

**Sample Solution: **

**JavaScript Code:**

```
const turn_On_Kth_Bit = (n, k) => {
if (typeof n!= "number") {
return 'It must be number!'
}
if ((n & 1) != 0) {
return 1;
}
n = n ^ (n & (n - 1));
pos = 0;
while (n != 0)
{
n = n >> 1;
pos++;
}
return pos;
}
n = 34
console.log(n + " in binary is " + n.toString(2))
position = turn_On_Kth_Bit(n);
console.log("Position of the rightmost set bit of the said number: " + position)
n = 104
console.log(n + " in binary is " + n.toString(2))
position = turn_On_Kth_Bit(n);
console.log("Position of the rightmost set bit of the said number: " + position)
```

Sample Output:

34 in binary is 100010 Position of the rightmost set bit of the said number: 2 104 in binary is 1101000 Position of the rightmost set bit of the said number: 4

**Flowchart: **

**Live Demo: **

See the Pen javascript-bit-manipulation-exercise-12 by w3resource (@w3resource) on CodePen.

* To run the code mouse over on Result panel and click on 'RERUN' button.*

**Improve this sample solution and post your code through Disqus**

**Previous:** Check if k^{th} bit is set or not for a number.

**Next:** Parity of a given number.

**What is the difficulty level of this exercise?**

Test your Programming skills with w3resource's quiz.

**Weekly Trends**- Python Interview Questions and Answers: Comprehensive Guide
- Scala Exercises, Practice, Solution
- Kotlin Exercises practice with solution
- MongoDB Exercises, Practice, Solution
- SQL Exercises, Practice, Solution - JOINS
- Java Basic Programming Exercises
- SQL Subqueries
- Adventureworks Database Exercises
- C# Sharp Basic Exercises
- SQL COUNT() with distinct
- JavaScript String Exercises
- JavaScript HTML Form Validation
- Java Collection Exercises
- SQL COUNT() function
- SQL Inner Join