In this hour you learned about the built-in C++ types, such as char, bool, int and float. You also learned about numeric and character variables and constants.
You must declare a variable before it can be used, and then you must store the type of data that you've declared correct for that variable. If you put too large a number into an integral variable, it produces an incorrect result.
This chapter also reviewed literal and symbolic constants, as well as enumerated constants, and showed two ways to declare a symbolic constant: using #define and using the keyword const.