JS-sandbox/randomNumberGenerator.html at master · lambda-projects-ak/JS-sandbox · GitHub

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<!DOCTYPE html>
<html>

<head>
  <meta charset="utf-8">
  <title>JS Test Page</title>
  <link rel="stylesheet" href="css/normalize.css">
  <!-- <link rel="stylesheet" href="css/style.css"> -->
</head>

<body class="style">
  <div class="content" style="text-align: center; margin-top: 50px;">
    <script type="text/javascript">

    // random number generator, collects two numbers, then writes one between two inputs.
    // assignment did not include conditionals, but I added them (found the ifNaN condition on google.)

    // prompt for first number, must be number.
    var firstNumber = Number(prompt ("Enter a number, then click OK. Note: I will round for you."));


    // check if a is number. If yes, prompt next number. If not, write refresh message.
      if (isNaN(firstNumber) || typeof firstNumber !== "number") {
        alert("Sorry, that wasn't a number. Please refersh the page and try again.");
        document.write ("Please refersh the page and try again.");
      }
    // prompt for second number, must be number. If not, write refresh message.
      else {
        var secondNumber = Number(prompt ("Enter a second number, then click OK."));
      }

    // check if b is number. If yes, generate number. If not, write message to refresh.
    if (isNaN(secondNumber) || typeof secondNumber !== "number") {
      alert("Sorry, that wasn't a number. Please refersh the page and try again.");
    } else {
        document.write ("You chose " + Math.round(firstNumber) + " and " + Math.round(secondNumber) + "<br><br>");
      }

    // figure out random number generator component (I had to watch the answer to get the math component)
    var randomNumber = (Math.floor(Math.random() * (secondNumber - firstNumber + 1) + firstNumber));
    var message = "Your random number is " + randomNumber + ".";

    document.write (message);


// random trials

    // variables
    //var firstNumber = (Math.floor(Math.random()) * 0 ) + Math.floor(a);
    //var secondNumber = (Math.floor(Math.random()) * 0 ) + b;

    // this always generates number 1.
    //  document.write ((Math.floor(Math.random()) * 1 ) + 1);

    // this always generates zero.
    // Math.floor(Math.random());


    // do I need these if I'm rounding down?
    //parseInt (a);
    //parseInt (b);


    </script>

  </div>
</body>

</html>