Read this for more on functions.
Chapter 3 Functions
A named sequence of statements that performs some useful operation. Functions may or may not take arguments and may or may not produce a result.
A statement that creates a new function, specifying its name, parameters, and the statements it contains.
A value created by a function definition. The name of the function is a variable that refers to a function object.
The first line of a function definition.
The sequence of statements inside a function definition.
A name used inside a function to refer to the value passed as an argument.
A statement that runs a function. It consists of the function name followed by an argument list in parentheses.
A value provided to a function when the function is called. This value is assigned to the corresponding parameter in the function.
A variable defined inside a function. A local variable can only be used inside its function.
The result of a function. If a function call is used as an expression, the return value is the value of the expression.
A function that returns a value.
A function that always returns None.
A special value returned by void functions.
A file that contains a collection of related functions and other definitions.
A statement that reads a module file and creates a module object.
A value created by an import statement that provides access to the values defined in a module.
The syntax for calling a function in another module by specifying the module name followed by a dot (period) and the function name.
Using an expression as part of a larger expression, or a statement as part of a larger statement.
flow of execution:
The order statements run in.
A graphical representation of a stack of functions, their variables, and the values they refer to.
A box in a stack diagram that represents a function call. It contains the local variables and parameters of the function.
A list of the functions that are executing, printed when an exception occurs.