Time for action – counting cannonballs

As with all data operations, the first step is to create a variable that stores the data you want to interact with. To count the number of cannonballs that the player fires, we'll need to use an integer variable with a script that increments the count by one every time the FireCannon function is called. Perform the following steps to count cannonballs:

1. Create a new C# script named ScoreKeeper, and attach it to your Cannon prefab.

2. Automatically add the script to all future instances of your Cannon prefab by clicking on Apply in the Inspector window after you attach the script.

3. Open the ScoreKeeper script, declare an int variable named numCannonballsFired, and initialize it to 0 in the Start function as shown in the following code:

   private int numCannonballsFired;
   void Start()
   {
     numcannonballsFired = 0;
   }

   Next, we need a public function that will increment the integer value by one every time it's called.

4. Create a new function named IncrementCount and add...