Undefined / Null
Explore the concepts of undefined and null in JavaScript to understand how variables behave when not assigned values or intentionally set to be empty. Learn when and why to use these types as part of mastering basic data handling in JavaScript.
We'll cover the following...
We'll cover the following...
Undefined values
When you declare a variable, its value is initialized to whatever value you assign by using the = sign. The following code snippet will initialize the variable as pi a number.
But what if we created a variable that didn’t assign any ...