胡阳pyhton作业题--20150730

求素数的代码

# coding:utf-8

while True:
num = raw_input('type an number:').strip()
try:
num = float(num)
except ValueError:
print 'Error Type'
continue

num = int(num)

i = 2
is_prime = False
while i < num:
for ii in range(2, i):
if i % ii == 0:
is_prime = False
break
else:
is_prime = True

if is_prime:
print i, 'is prime'

i += 1
else:
break