Define reusable blocks of code.
✍️ 3 exercises + code challenge in this lessonA function is defined with def and runs when called.
def greet(name="Guest")greet(name="Ali")*args collects extra positional arguments into a tuple; **kwargs collects keyword arguments into a dict.return sends a value back; a function without return returns None.Mastering Python Functions helps you write clean and reliable Python code. Follow standard conventions, test edge cases, and keep logic simple. Try running the code example below and complete the exercises to build confidence.
def greet(name="Guest", greeting="Assalam-o-Alaikum"):
return f"{greeting}, {name}!"
def total(*prices, discount=0):
return sum(prices) * (1 - discount)
def profile(**info):
for key, value in info.items():
print(f" {key}: {value}")
print(greet())
print(greet("Sara", greeting="Hello"))
print("Total:", total(1200, 800, 500, discount=0.1))
profile(name="Ali", city="Lahore", role="Developer")Check what you learned in “Python Functions”.
Define a function.
greet(name):
What does a function return if it has no return statement?
Write a function area(w, h) that returns w * h and print area(4, 5).
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