Try it Editor: Datatypes undefined

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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>
</html>

Result :