import math
def is_prime(num):
if num == 0:
return 0
if num == 1:
return 0
for p in range(2, int(round(math.sqrt(num))) + 1):
if int(round(num % p)) == 0:
return 0
return 1
lst = [4, 8, 17, 5, 9, 22, 21, 13, 18, 99]
for i in range(len(lst)):
if is_prime(lst[i]):
print(lst[i])
'''
run:
17
5
13
'''