Doubt in applying the value for a variable

Tell us what’s happening:
Describe your issue in detail here.
i have a bit confusion , as how to apply the value

Your code so far

var myVar = 0;
var myVar = a;
a = 9;

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/101.0.4951.54 Safari/537.36

Challenge: Initializing Variables with the Assignment Operator

Link to the challenge:

You are not supposed to be initializing a variable named myVar. The instructions want you to initialize a variable named a with the value 9. The difference between just declaring a variable and initializing a variable is you do not assign a value to a variable when you just declare it.

For example, the following just declares a variable named b:

var b;

The following initializes a variable named c with the value 20:

var c = 20;