how to call a function in python

To call a function in Python, you need to use the function name followed by parentheses containing any required arguments. Here’s an example:

# define a function
def greet(name):
    print("Hello, " + name + "!")

# call the function
greet("Alice")

In this example, we define a function called greet that takes a single argument name, and when called it prints a greeting containing the name. We then call the greet function and pass in the argument "Alice", resulting in the output Hello, Alice!.

Note that if the function does not take any arguments, you still need to include empty parentheses when calling the function:

# define a function with no arguments
def say_hello():
    print("Hello!")

# call the function
say_hello()

This will output Hello! when called.