L5-HTMLPage14.html

﻿<!DOCTYPE html>

<html lang="en" xmlns="http://www.w3.org/1999/xhtml">

<head>
  <meta charset="utf-8" />
  <title>switch</title>
  <script>
    function getUserInput() {

      var name = prompt("How old are you", "17");

      alert("You will be 25 in " + (25 - name) + " years");
      alert("In 8 years, you will be " + (name + 8) + " years old");

      alert("You will be 25 in " + (25 - parseInt(name)) + " years");
      alert("In 8 years, you will be " + (parseInt(name) + 8) + " years old");

      var x = parseFloat(name);
    }

    function JavaScriptNumbersFun(inputDataArray) {

      var sum = 0;

      for (i in inputDataArray) {
        sum = sum + i;
      }

      var mean = sum / inputDataArray.length;
      alert(mean);
    }
  </script>
</head>

<body>
  <h1>JavaScript user input</h1>

  <div><button onclick="getUserInput()">Click me</button></div><p></p>

  <div><button onclick="JavaScriptNumbersFun([3, 4, 5])">Numbers fun in JavaScript</button></div>
</body>

</html>