pav
8/18/2013 - 1:54 PM

JavaScript has a built-in function called Number(). It converts the value in parentheses to a number that can be used in calculations. If it

JavaScript has a built-in function called Number(). It converts the value in parentheses to a number that can be used in calculations. If it is not a number, it will return NaN (Not a Number).

temperature_converter
content_copyfile_download
<html>
    <head>
        <script type="text/javascript" src="script.js"></script>
    </head>

    <body>
        <form name="tempForm">
            <label for="temp">Temperature:</label>
            <input type="text" id="temp"><br>

            <input type="radio" name="choice" value="fahrenheit" checked>Convert to Fahrenheit <br>
            <input type="radio" name="choice" value="celsius">Convert to Celsius  <br>

            <label for="resultField">Result: </label>
            <input type="text" id="resultField"><br>

            <input type="button" value="Convert" onclick="processForm()">
        </form>

    </body>

</html>
convert_value_to_number
content_copyfile_download
function processForm() {
    
    var temperature = Number(document.tempForm.temp.value);

}