JavaScript Type Conversion
Number() is converted to a number, String() is converted to a string, and Boolean() is converted to a Boolean value.
JavaScript Data Types
There are 5 different data types in JavaScript:
string
number
boolean
object
function
3 object types:
Object
Date
Array
2 A data type that does not contain any value:
null
undefined
typeof operator
You can use the typeof operator to view the data of a JavaScript variable type.
<html>
<body>
<script type="text/javascript">
var test=new Array();
if (test.constructor==Array)
{
document.write("This is an Array");
}
if (test.constructor==Boolean)
{
document.write("This is a Boolean");
}
if (test.constructor==Date)
{
document.write("This is a Date");
}
if (test.constructor==String)
{
document.write("This is a String");
}
</script>
</body>
</html>Next Section