What does it mean to declare a variable? What is a data type? How do you assign a value to a variable? Are there any special rules you need to follow when coming up with a name for a variable?

https://www.youtube.com/watch?v=jLC8_oDMFcg

This does not have to be 3 to 4 pages long. You can just summarize the answers to these questions in a way that i can understand them.