What is the output of this code

Question

X = 4
X _= 5
Print (x)

Answer 1

This will produce a NameError.
This is because the variable x is not defined.

Remember Python is case sensitive. The variable x and X are two different things.

Also Print is a NameError because of the case sensitivity. Print is not defined as a valid python function.

Answer 2

Assuming you fix the capitalization problem and change the code to
x = 4
x -= 5
print(x)
the output will be the result of operation in the second line x -= 5, which is the same as saying x = x - 5, i.e. x = 4 - 5, i.e. -1.
Try it in the Code Playground and see for yourself 🙂