Explain types and variables

What are variables? Why use them?

Explain the five types: string, integer, double, bool, char

How do you assign values to variables? show a screen snip and explain

Show a simple calculation and explain e.g. hello + world, x + y

Explain type casting and conversion

What is type casting? Why would you use it?

Whats the difference between implicit and explicit type casting.

Provide some examples of type casting e.g. string to integer, string to double

Show a screen snip and explain your code.