Create Pythagorean

From professor:
Great. One step further would be to add isNaN tests on the parsed values. Then you could stop the function from processing values that are not numbers.
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/isNaN

  if(isNaN(sideA) || isNaN(sideB)){
      alert("Please input only numbers");
  } else {
  
  // your code here to compute the value of side c
  var sideC = Math.sqrt(Math.pow(sideA, 2) + Math.pow(sideB, 2));
    
  // your code here to call the function displayResult
  displayResult(sideA, sideB, sideC);

  }