问题描述：
为什么is_prime对某些数字失败了？
问题解决：
如果你的代码对某些数字失败了，可能是因为你return太快了，或者因为你return错了地方错了。在不给出答案的情况下，请查看下面的示例控制流伪代码：
# From hint: any number less than 2 is not prime
if x is less than 2:
return x is not prime
# This loop is where we put our number to the test and return False
# so the function exits immediately if x isn’t prime
for n from 2 to x:
if x is evenly divisible by n:
return x is not prime
# If we made it here, our number must be prime because none
# of the other return statements were executed!
return x is prime
为什么is_prime对某些数字失败了？
问题解决：
如果你的代码对某些数字失败了，可能是因为你return太快了，或者因为你return错了地方错了。在不给出答案的情况下，请查看下面的示例控制流伪代码：
# From hint: any number less than 2 is not prime
if x is less than 2:
return x is not prime
# This loop is where we put our number to the test and return False
# so the function exits immediately if x isn’t prime
for n from 2 to x:
if x is evenly divisible by n:
return x is not prime
# If we made it here, our number must be prime because none
# of the other return statements were executed!
return x is prime
