Parameters and Arguments

What You’ll Learn

You’ll learn how to pass data, known as parameters, into a function.

Arguments

Information can be passed into functions as arguments. Arguments are specified after the function name, inside the parentheses.

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

greet("Alice")
greet("Bob")

Expected Output:

Hello Alice!
Hello Bob!

Multiple Arguments

You can add as many arguments as you want, just separate them with a comma.

def full_name(first, last):
    print(first + " " + last)

full_name("John", "Doe")

Parameter vs Argument

From a function’s perspective:

• A parameter is the variable listed inside the parentheses in the function definition (e.g., first and last).
• An argument is the value that is sent to the function when it is called (e.g., "John" and "Doe").

By default, a function must be called with the correct number of arguments. If your function expects 2 arguments, you have to call the function with 2 arguments, not more, and not less.