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User Defined Functions
A function is a named, reusable block of code that performs a specific task. Instead of repeating the same code, you can define it once as a function and call it whenever needed.
Defining a Function
def greet(name):
print("Hello,", name)
greet("Meera")Functions with Multiple Parameters
def add_numbers(a, b):
print("Sum:", a + b)
add_numbers(5, 10)Default Parameter Values
def greet(name, greeting="Hello"):
print(greeting + ",", name)
greet("Aditi")
greet("Rahul", "Good Morning")Breaking a data science script into small, well-named functions, such as one for loading data and another for cleaning it, makes code far easier to read, test, and reuse.
Coming Up
Functions can also send a value back to the code that called them. The next topic covers exactly how this works, through the concept of the return statement.