When i changed i=i+1 to i+=i,the output also changed into 1,2,3,4,finished....previously output was 1,2,3,4,5,finished.why?

Question

i = 1
while i <=5:
print(i)
i += i

print("Finished!")

Answer 1

i=i+1 is same as i+=1
And different to
i+=i which is i+=i

the output was 1,2,4 ?

Answer 2

Yep