JavaS/Ex6.html at master · JanikOskar/JavaS · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
<DOCTYPE! html>
  <html>

  <head>
    <title>Exercise 6</title>
  </head>

  <body>
    <button onclick="myFunction()">Try it</button>
    <p id="demo"></p>
    <script>
      function myFunction() {
        let choice = prompt("Take s for sum or m for multi");
        if (choice === "s") {
          var n = Number(prompt("Your number"));
          let sum = 0;
          for (i = 1; i <= n; i++) {
            sum += i;
          }
          document.getElementById("demo").innerHTML = sum;
        } else if (choice === "m") {
          var n = Number(prompt("Your number"));
          let mul = 1;
          for (i = 1; i <= n; i++) {
            mul *= i;
          }
          document.getElementById("demo").innerHTML = mul;
        } else {
          document.write("Wrong letter");
        }
      }
    </script>
  </body>

  </html>
</DOCTYPE!>