python define function -

 In Python, a function is a block of code that performs a specific task and can be called from other parts of your program. Functions are a convenient way to divide your code into logical blocks and reuse them as needed.

To define a function in Python, you use the def keyword followed by the function name and a pair of parentheses. Optionally, you can include parameters inside the parentheses. The syntax for defining a function in Python is as follows:

def function_name(parameters):
    # code to be executed

Here, function_name is the name of the function, and parameters are the variables that are passed to the function when it is called. The code inside the function is indented and is executed when the function is called.

For example, here is a simple function that takes a single parameter and prints it to the console:

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

To call a function in Python, you use the function name followed by a pair of parentheses and any required arguments. For example:

greet("John")  # Output: Hello, John
greet("Alice")  # Output: Hello, Alice

You can also specify default values for the parameters in your function definition, using the assignment operator (=). This allows you to call the function with fewer arguments, and the default values will be used for any omitted arguments. For example:

def greet(name, greeting="Hello"):
    print(greeting + ", " + name)

greet("John")  # Output: Hello, John
greet("Alice", "Hi")  # Output: Hi, Alice

For more information on defining and calling functions in Python, you can refer to the Python documentation or search online for tutorials and examples.