Need help in variables

Hi Roger, I'll do my best to help you out.

Think of a variable as a box where you will store a value (empty being a valid value for it.)

You use variables to store data and use it around your application. Using variables can help you save computing power as you can avoid having to recalculate values when you're going to use it several times. It can also be used to change the value of Labels, Images and other components in your User Interface.

There are different types of values that your variable can store. The type you choose for your variable will depend on what you want it to store. For example, the number 2 can be stored as an Int if you're going to be using it for mathematical operations, but can be stored as "2" in the form of a string if you're primarily going to use it as text. You can usually convert numbers stored as string into number formats (such as float or decimal.)

Apple has great documentation on the different kind of variable types and what they can be used for in case you want to dive further into it.

I hope this helps, and feel free to ask follow up questions!