JavaScript Undefined
In JavaScript, a variable without a value, has the value undefined. The type is also undefined
Example :
<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Operators</h1>
<h2>The typeof Operator</h2>
<p>The value (and the data type) of a variable with no value is <b>undefined</b>.</p>
<p id=”demo”></p>
<script>
let car;
document.getElementById(“demo”).innerHTML =
car + “<br>” + typeof car;
</script>
</body>
</html>
Output
JavaScript Operators
The type of Operator
The value (and the data type) of a variable with no value is undefined.
undefined
undefined
Description :
In JavaScript, undefined is a special value that means a variable has been declared but has not been assigned a value yet.
