How can you make a parameter optional in a Python function?

In Python, you can make a parameter optional by assigning it a default value in the function definition.

When a default value is specified, the parameter becomes optional, and the function can be called without explicitly passing a value for it.

For example:

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

Here, the parameter name is optional because it has a default value of "Guest".

Note: If no value is provided when the function is called, the default value will be used.