By R. L. Constable
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Additional resources for An Introduction to the PL/CV2 Programming Logic
Here is a function that returns a string. """ if number % 2 == 0: return 9Even9 else: return 9Odd9 odd_or_even_string = odd_or_even(7) print(odd_or_even_string)Output: OddHere is a similar function that returns a boolean. """ if number % 2 == 0: return False else: return True print(is_odd(7))Output TrueYou can create functions that call other functions. Here's an example. def get_name(): """Get and return a name""" name = input(9What is your name? format(name)) def get_and_say_name(): """Get and display name""" name = get_name() say_name(name) get_and_say_name()Output: What is your name?
Here is a logical view of code blocks. Block One Block Two Block Two Block Three Block One Block OneBy convention, code blocks are indented using four spaces but this in not strictly enforced. Python allows you to use other levels of indentation. For example, using two spaces for indentation is next most popular choice after four spaces. Be consistent. If you decide to use two spaces for indentation, then use two spaces throughout the program. However, I strongly recommend following the conventions unless you have a good reason not to do so.
Fruit = 9apple9 first_char = fruit Built-in Functions A function is a section of reusable code that performs an action. A function has a name and is called, or executed, by that name. Optionally, functions can accept arguments and return data. The print() Function Python includes many built-in functions, one of which is the print() function. When a value is provided as an argument to the print() function it displays that value to the screen. You can supply values directly to the print statement or pass in variables.
An Introduction to the PL/CV2 Programming Logic by R. L. Constable