pops up an error

Traceback (most recent call last):
  File "script.py", line 2, in <module>
    y1 = int(input())
EOFError: EOF when reading a line

Who will tell you how it should be and why?

Answer 1, authority 100%

EOFErroroccurs when CTRL-D is pressed.

By the way, it is better to do so that the input contains text and you should output not the text “y2”, but the variable y2:

y1 = int(input("Entery1: "))
r = int(input("Enterr: "))
if abs(y1) <= abs(r) and ((y1 > 0 and r < 0) or (y1 < 0 and r > 0)):
    if  r > 0: y2 = y1 + r + 1
elif r < 0:
    y2 = y1 + r - 1
else:
    y2 = y1 + r 
print(y2)

You can also try excepton inputso that only numbers can be entered