我的else语句为什么不执行

Question

我是python的新手。我想了解为什么我的else语句不起作用？ else语句应返回“零”，但返回“无”。

def number_group(number):
  if number > 0:
    return "Positive"
  elif number < 0:
    return "Negative"
  else:
   "Zero"

print(number_group(10)) #Should be Positive
print(number_group(-5)) #Should be Negative
print(number_group(0)) #Should be Zero

Answer 1

别忘了return语句：

def number_group(number):
  if number > 0:
    return "Positive"
  elif number < 0:
    return "Negative"
  else:
    return "Zero"

print(number_group(10)) #Should be Positive
print(number_group(-5)) #Should be Negative
print(number_group(0)) #Should be Zero

Answer 2

您忘了在最后一行添加退货

# you wrote "zero"
# you should use
else:
    return "Zero"