Return an incremented value : Function « Language Basics « JavaScript DHTML






  1. JavaScript DHTML
  2. Language Basics
  3. Function

Return an incremented value

  

<head>
<title></title>
<script type = "text/javascript" >
function incrementNum(myNum) {
    if (isNaN(myNum)) {
        alert(myNum + " isn't a number.");
        return;
    }
    return myNum + 1;
}
</script>
</head>
<body>
<script type = "text/javascript" >
alert(incrementNum(3));
</script>
</body>








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