Just as Python has a number of built-in operators (such as + for addition, - for subtraction, * for multiplication, and so on), it also comes with a number of what are called built-in functions.
This chapter discusses the following topics:
Built-in functions
Using a function/function call
Arguments
Getting a result back from a function
The type function
Getting input from the user using input
Conversion functions: int, float, and str
Building our first real programs
Concatenation, or adding strings together
Another programming exercise
Using function calls inside assignment statements
