Python · Functions

Default argument

Supplies a value when the argument is omitted. Never use a mutable default such as [].

pythonRunnable example python course

Syntax

def f(x, y=10):

Example

Open in the lab

def greet(name, greeting="Hello"):
    return f"{greeting}, {name}"
print(greet("Ada"), greet("Ada", "Hi"))

Reference pages are the quick answer. The course explains the why, shows the full example and ends with a challenge.