To define a function in Python, you use the def keyword, followed by the function name, a pair of parentheses, and a colon. Any parameters that the function takes should be listed inside the parentheses. Here’s an example:
def greet(name):
print("Hello, " + name + "!")
In this example, we define a function called greet that takes one parameter name. When the function is called, it will print a greeting message to the console with the name that was passed in as an argument.
You can also include a return statement in your function to return a value to the caller. Here’s an example:
def add(a, b):
return a + b
In this example, we define a function called add that takes two parameters a and b. The function returns the sum of these two values.