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// your "ECMAscript" does not belong here... 
    var input = document.querySelector('.numberInput');
    var para = document.querySelector('p');

// your "ECMAscript" does not belong here... 
    var input = document.querySelector('.numberInput');
    var para = document.querySelector('p');
  //-moz:Let's add some useful functions! +sole:...
  function squared(num) {  return num * num;   }

function cubed(num) {  return num * num * num;   }

function factorial(num) {
  if (num < 0) return undefined;
  if (num == 0) return 1;
  let x = num - 1;
  // ?
  while (x > 1) {
    num *= x;
    x--;        }
  return num;
}

// your "ECMAscript" does not belong here... 
    var input = document.querySelector('.numberInput');
    var para = document.querySelector('p');
  //-moz:Let's add some useful functions! +sole:...
  function squared(num) {  return num * num;   }

function cubed(num) {  return num * num * num;   }

function factorial(num) {
  if (num < 0) return undefined;
  if (num == 0) return 1;
  let x = num - 1;
  // ?
  while (x > 1) {
    num *= x;
    x--;        }
  return num;
}
  //-moz:Next, we're going to include a way to print out information about the number entered into the text input.
  // Enter the following event handler below the existing functions: 
input.addEventListener('change', () => {
  var num = parseFloat(input.value);
  if (isNaN(num)) {    para.textContent = 'You need to enter a number!';  }
  else {
    para.textContent = num + ' squared is ' + squared(num) ;
    para.textContent += num + ' cubed is '  + cubed(num) ;
    para.textContent += num + ' factorial is ' + factorial(num) ;
  }
});
//-moz:Save your code, load it in a browser,