Question

What is the output of the following snippet?

"`python

def fun(x):
→x += 1
→return x

x = 2
x = fun(x+1)
print(x)
"`

Answer 1

The code snippet's output is the number 4. The variable x is updated by the function fun, which increments its input by 1 before returning it.

Step-by-step explanation:

The question is about understanding the output of a Python code snippet. When the code is executed, the following steps happen:

1. The function fun takes an input x, adds 1 to it, and returns the new value.
2. The variable x is initially set to 2.
3. The function fun is then called with the argument x+1 (which is 2 + 1 = 3), making the function parameter x inside the function equal to 3.
4. Inside the function, x is incremented by 1, so the return value becomes 4.
5. This return value is then assigned back to the variable x outside the function.

Therefore, when print(x) is executed, the output is 4.