用for循环嵌套输出2~50的素数是哪一步错了吗？没有运行结果

for x in range(2,51):
for i in range(2,x):
if x%i==0:
break
else:
print()

for x in range(2, 51):
    for i in range(2, x):
        if x % i == 0:
            break
    else:
        print(x)