Description

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Beginner · 12 min

Reusable functions

Define a function and pass a value to it.

Name a reusable action

def defines a function. Its body is indented and does not run until the function is called. Put parentheses after the function name to call it.

def greet():
    print("Welcome")

greet()
greet()

Output

Welcome
Welcome

Pass in a value

A parameter names an input inside the function. Each call supplies an argument for that parameter. Reuse the same instructions with different values.

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

greet("Ada")
greet("Mina")

Output

Hello, Ada
Hello, Mina

Reusable functions

  1. Separate the function definition from its calls.
  2. Follow the argument into the parameter.

Try it yourself

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Reuse a greeting

Define greet(name) to print a greeting using its parameter. Keep both supplied calls. Display Hello, Ada and Hello, Mina on separate lines.

Practice