11/19/2023 0 Comments Write function pythonWe can check this by assigning the result of a print statement to a Python variable: > result = print('Hello') Because it prints something to the screen, it might look like it does, but it doesn’t. Print takes an argument and prints it to the screen.Īs stated in our definition, functions can optionally return a value. Let’s start with the most well-known built-in function, called print: > print('Hello, readers!') Built-in Python functionsīefore we start defining functions ourselves, we’ll look at some of Python’s built-in functions. In fact, a Python function can even return multiple values. This value is often the result of some calculation or operation. Return valuesĪ function can return a value. The big advantage here, is that you can alter the function’s behavior by changing the parameter. Parametersįunctions accept a parameter, and you’ll see how this works in a moment. E.g., you can also group code into modules and packages. Other forms of code reuse are explained later on. This way, others (or future you) can read your code, and without looking at all of it, understand what it’s doing anyway because of the well-chosen function names. By giving a function a well-chosen name, your code will become even more readable because the function name directly explains what will happen. So it aids in code reuse: you don’t want to write the same code more than once.įunctions are a great way to keep your code short, concise, and readable. Advantages of using functions Code reuseĪ Python function can be defined once and used many times. But before we start doing so, let’s first go over the advantages of functions, and let’s look at some built-in functions that you might already know. We define a Python function with the def keyword. Let’s define what a function is, exactly: Function A Python function is a named section of a program that performs a specific task and, optionally, returns a valueįunctions are the real building blocks of any programming language.
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