# JavaScript - Number of 0 bits in a binary representation

## JavaScript Bit Manipulation: Exercise-3 with Solution

Write a JavaScript program to count 0 bits in the binary representation of a given integer.

Test Data:
(45) -> 2
(17) -> 3
(15) -> "Parameter value is not an Integer!"

Sample Solution:

JavaScript Code:

``````// Define a function to count the number of set bits (1s) in the binary representation of a given integer
function Binary_Count_SetBits(a)
{
// Check whether the input is an integer
if (!Number.isInteger(a))
{
return('Parameter value is not an Integer!') // Return an error message if the input is not an integer
}
// Convert the integer to its binary representation, split it by '0', and count the number of substrings
return a.toString(2).split('0').length - 1
}
console.log(Binary_Count_SetBits(45)) // Test the function with the integer 45
console.log(Binary_Count_SetBits(17)) // Test the function with the integer 17
console.log(Binary_Count_SetBits("15")) // Test the function with the string "15"
```
```

Output:

```2
3
Parameter value is not an Integer!
```

Flowchart:

Live Demo:

See the Pen javascript-bit-manipulation-exercise-2 by w3resource (@w3resource) on CodePen.

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

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