In which cases should arguments be specified when declaring a function?

Arguments when declaring a function in Python are specified when the function needs to accept input data for processing. This makes the function more versatile and reusable. For example, if a function should perform an operation on different values, arguments specify these values during the call.

If the function does not depend on external data and always performs the same action, arguments can be omitted.

Example:

def greet(name):
    print(f"Hello, {name}!")

greet("Anna")  # Outputs: Hello, Anna!