HTML radio buttons allow users to interact with the website, usually via JavaScript.
HTML elements of radio buttons are placed in two or more of them in a group.
In a group of radio buttons, only one can be selected, because selecting another radio button automatically deletes the previous selection.
<form>
<input type="radio" name="language" value="html">HTML <br>
<input type="radio" name="language" value="css"> CSS <br>
<input type="radio" name="language" value=javascript>JAVASCRIPT <br>
</form>
result:
<form>
<input type="radio" name="language" value="html">HTML <br>
<input type="radio" name="language" value="css"> CSS <br>
<input type="radio" name="language" value=javascript>JAVASCRIPT <br>
<input type="submit"> <br>
</form>
result: