JavaScriptPractice/if_else2.html at main · EduKeyPath/JavaScriptPractice · 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
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>demo</title>
</head>
<body>
<h4>Adult Age Checking</h4>
<input type="text" name="" value="" id="agF1" />
<input type="button" name="" value="Age Check" onclick="ageChk()" />
<p id="demo"></p>
<script>

    function ageChk(){
        var agV = document.getElementById('agF1').value;
        if(isNaN(agV)){
            document.getElementById('demo').innerHTML = 'Not a Valid Number';
        }else{
            document.getElementById('demo').innerHTML = (agV > 18) ? "Adult Person" : "Under 18+";
        }
    }
</script>

<script>
    var x = 10;
    var xx = 0;
    var xxx = 0;
    for(i=0; i < x; i++){
        if(i == 3){
            xx++

            continue;
        }
        xxx += 'number is' + i + '<br/>'
    }
    if(xx > 0){
        document.write('3 exist');
    }else{
        document.write('3 not exist');
    }
    document.write(xxx);
</script>


<br/><br/><br/><br/><br/><br/><br/>
<br/><br/><br/><br/><br/><br/><br/>
<br/><br/><br/><br/><br/><br/><br/>
</body>
</html>