<!DOCTYPE html>
Radio button:<input type="radio" id="myRadio" checked>
<p>Click the "Try it" button to find out whether the radio button is checked, or not.</p>
<button onclick="myFunction()">Try it</button>
<p id="demo"></p>
function myFunction() {
  var x = document.getElementById("myRadio").checked;
  document.getElementById("demo").innerHTML = x;
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