function: 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.
function definition: A statement that creates a new function, specifying its name, parameters, and the statements it contains.
function header: The first line of a function definition.
function body: The sequence of statements inside a function definition.
function argument: The value(s) given to the function inside the function header parentheses.
parameter: A name used inside a function to refer to the value passed as an argument.
function call: A statement that runs a function. It consists of the function name followed by an argument list in parentheses.
argument: A value provided to a function when the function is called. This value is assigned to the corresponding parameter in the function.
local variable: A variable defined inside a function. A local variable can only be used inside its function.
global variable: A variable defined outside of function. A global variable can be used anywhere in the program using the global keyword.
global keyword: Python keyword to indicate the use of a global variable.