Why does this give an unexpected answer?

Question

def countdown():
i=10
while i > 0:
yield i
i -= 0.2

for i in countdown():
print(i)
#this should count down by 0.2

The result is long decimals why?

Answer 1

So this is not about the inaccuracy of floats?

Because they have long decimals sometimes. Try print(0.2) for an instance.

Answer 2

No, I dont' think so. But thanks for answering Michael Williams

Answer 3

Would using round be useful?