# Learn Recursion by Building a Decimal to Binary Converter - Step 39

### Tell us what’s happening:

Describe your issue in detail here.

My Math.floor() code is not passing the challenge.

``````/* file: script.js */
const numberInput = document.getElementById("number-input");
const convertBtn = document.getElementById("convert-btn");
const result = document.getElementById("result");

const decimalToBinary = (input) => {
let binary = "";

while (input > 0) {

// User Editable Region

input = 0;
input =  Math.floor( input / 2 );

// User Editable Region

}

result.innerText = binary;
};

const checkUserInput = () => {
if (!numberInput.value || isNaN(parseInt(numberInput.value))) {
return;
}

decimalToBinary(parseInt(numberInput.value));
numberInput.value = "";
};

if (e.key === "Enter") {
checkUserInput();
}
});
``````

User Agent is: `Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/109.0.0.0 Safari/537.36`

### Challenge Information:

Learn Recursion by Building a Decimal to Binary Converter - Step 39

You appear to have created this post without editing the template. Please edit your post to Tell us what’s happening in your own words.

Hi @edwin1

Why are you assigning zero to input?

Happy coding

Ooh! that’s the mistake.

the zero assignment to input was my previous challenge then i forgot to clean it.

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