# Learn Recursion by Building a Decimal to Binary Converter - Step 73

### Tell us what’s happening:

Anyone know what am I exactly doing wrong here? The output states
If input is equal to `0` or `1` , your `decimalToBinary()` function should return `String(input)` .

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

const decimalToBinary = (input) => {

// User Editable Region

if (input === 0 || input === 1 ) {
return decimalToBinaryString(String(input));

} else {
return decimalToBinary(Math.floor(input / 2)) + (input % 2);
}

// User Editable Region

};

const checkUserInput = () => {
if (!numberInput.value || isNaN(parseInt(numberInput.value))) {
alert("Please provide a decimal number");
return;
}

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

convertBtn.addEventListener("click", checkUserInput);

numberInput.addEventListener("keydown", (e) => {
if (e.key === "Enter") {
checkUserInput();
}
});
``````

### Your browser information:

User Agent is: `Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.0.0 Safari/537.36`

### Challenge Information:

Learn Recursion by Building a Decimal to Binary Converter - Step 73

Hello!

You just have to return the stringified “input”, no need for a function .