what should be the result

Question

print('welcome to addition calculator\n')
x = input('press any number from 0-9\n' )
y = input('press any number from 0-9\n' )
z = x+y
print(z)

Answer 1

Addition of two numbers which user has given as input.

Answer 2

In your code x and y are strings, so x+y is the concatenation of these strings. For instance '25'+'25'='2525'. Use int(input()) or float(input()) to get the numbers