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<!DOCTYPE html>
<html>
<body>
​
<h2>JavaScript</h2>
​
<p>The value (and the data type) of a variable with no value is <b>undefined</b>.</p>
​
<p id="demo"></p>
​
<script>
var car;
document.getElementById("demo").innerHTML =
car + "<br>" + typeof car;
</script>
​
</body>
​
<!-- Mirrored from www.w3schools.com/js/tryit.asp?filename=tryjs_datatypes_undefined by HTTrack Website Copier/3.x [XR&CO'2014], Mon, 27 Jan 2020 02:28:12 GMT -->
</html> 
​
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