Why the output of this code is 2

Question

a={0:1, 1:2}
_sum= 0
for b in a: _sum += b
Print(_sum)

Answer 1

The output isn't 2, it's 1. Try it in the code playground. _sum is the sum of the keys, i.e. 0 + 1 = 1

Make sure you change 'Print' to 'print' first 😉

Answer 2

Well, the result is 1 and not 2