What are side effects in Python?

What are side effects in Python?

In Python, a side effect is when a function modifies some state outside its local environment, like changing a global variable.

Can you give me an example of a function with side effects?

Sure! Here's an example:

count = 0

def increment():
    global count
    count += 1

This function modifies the global variable count.

Are side effects always bad in programming?

Not necessarily! While they can make code harder to understand and debug, they can also be useful for certain tasks.

How can I avoid side effects in my functions?

You can avoid side effects by using pure functions, which return the same output for the same input and do not modify any external state.