Why when I run this code it doesn't give me an output

Question

And how to deal with multiple inputs
x = input()
y= input()
op= input()
if op == 0 :
print (x+y)

Answer 1

because the input function returns a string...add quotes around the 0 in the if statement or cast the input to an integer

Answer 2

How to deal with multiple inputs?
You mean in Code Playground?
See if this can help

https://code.sololearn.com/WhiNb9BkJUVC/?ref=app