How to declare and initialize a boolean variable (a boolean variable is a variable that has two otions, like a light switch, it can be turned on, or off).
How to declare and initialize an integer variable (an integer variable is a variable that allows numbers to be displayed. These are only only whole numbers and negative whole numbers).
How to declare a Double variable (a double variable is the same as a integer exept for the fact that the double integer can hold decimal numbers).
How to declare and initialize a string variable (a string variable is just a variable that contains text).
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