Function Parameters

A function parameter is a named placeholder in a function's definition that receives a value when the function is called. Parameters let you write flexible functions that produce different results depending on the input they receive.

Defining Parameters

Parameters are listed inside the parentheses when a function is defined. When the function is called, the values passed in are called arguments, and they get assigned to the corresponding parameters.

def greet(name):
    print("Hello,", name)

greet("Abhay")

Here, name is the parameter, and "Abhay" is the argument passed when calling the function.

Default Parameter Values

You can assign a default value to a parameter, which is used automatically if no argument is provided for it during the function call.

def greet(name="Guest"):
    print("Hello,", name)

greet()          # Hello, Guest
greet("Priya")   # Hello, Priya

Coming Up Next

Now that you understand how parameters work, the next section explores the different ways arguments can actually be passed into a function.