Question

What is the output of the following snippet?

"`python

def fun(x):
global y
y = x * x
return y

fun(2)
print(y)
"`

Answer 1

The Python code snippet sets a global variable 'y' to the square of the argument passed to the function 'fun'. When 'fun(2)' is called, 'y' is set to 4. Therefore, the output is 4.

Step-by-step explanation:

The code snippet provided is written in Python and demonstrates the use of a global variable. When the function fun() is called with the argument 2, it sets the global variable y to the square of the number provided, which is 2 * 2.

Here is the breakdown of the code:

• The function fun(x) is defined with a parameter x.
• Inside the function, the keyword global is used to declare that y should be treated as a global variable.
• The value of y is set to x squared (x * x).
• The value of y is returned, although this return value is not used as nothing catches it when fun(2) is called.
• After calling fun(2), the print statement outputs the value of y, which is now 4.

Thus, the output of the given snippet will be: 4.