Check the function parameters : Function « Language Basics « JavaScript DHTML

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JavaScript DHTML » Language Basics » Function

Check the function parameters


  



<head>

<title></title>

<script type = "text/javascript" >

function addNums(firstNum,secondNum) {

    if ((isNaN(firstNum)) || (isNaN(secondNum))) {

        alert("Arguments must be numbers.");

        return;

    }

    else if (firstNum > secondNum) {

        alert(firstNum + " is greater than " + secondNum);

    }

    else {

        return firstNum + secondNum;

    }

}

</script>

</head>

<body>

<script type = "text/javascript" >

document.write(addNums("aaa",3));

document.write("<BR>");

document.write(addNums(2,3));

</script>

</body>

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