Calling Functions

In the previous exercise, you may have noticed that when we define a function and run the code, nothing happens. This is because the function will execute only when it is called. We call a function by using its name followed by parentheses. For example, if we have a function defined like this:

def myFunction():
    print("This is my function")

We can call it in the following way:

myFunction() # Outputs: This is my function

When we call a function, its body is executed. In this case, it prints This is my function. Functions can be called repeatedly and whenever needed within the program. It is important that the function must be defined before it is used. For example, this works:

def myFunction():
    print("This is my function")

myFunction()

This does not work:

myFunction()

def myFunction():
    print("This is my function")