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Chapter 3. Calculate This!

In the previous chapter, you learned about the uses of variables, different data types, and functions. You created your own function and learned how to get basic information from a user with the raw_input() function. Using these building blocks, you can begin to design basic programs.

The first program we make will be a five-function calculator that calculates two numbers as input. The calculator will help us learn to understand the mathematical functions that are a part of Python, which will be useful for our game at the end of the book. In addition to this, this calculator will form the foundation for a more complex calculator in Chapter 5, Loops and Logic.

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