We briefly discussed functions in Python. Functions execute a predefined set of task. print is one example of a function in Python. It enables printing something to the screen. Let's discuss writing our own functions in Python.
A function can be declared in Python using the def keyword. A function could be defined as follows:
def my_func():
print("This is a simple function")In this function my_func, the print statement is written under an indented code block. Any block of code that is indented under the function definition is executed when the function is called during the code execution. The function could be executed as my_func().
A function is always defined with parentheses. The parentheses are used to pass any requisite arguments to a function. Arguments are parameters required to execute a function. In the earlier example, there are no arguments passed to the function.
Let's review an example where we pass an argument to a function...