Can you explain what is meant by default value when declaring a function?

The default value when declaring a function in Python is the value of a parameter that is used if this parameter is not provided when calling the function. This allows calling the function with fewer arguments than specified in the definition, and parameters with default values automatically receive these values.

Example:

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

# Call with two arguments
greet("Anya", "Hello")  # Will output: Hello, Anya!

# Call with one argument, greeting will take the default
greet("Ivan")  # Will output: Hello, Ivan!

It is important to remember that parameters with default values should come after required parameters.