编程题
14. ls是一个列表，内容如下：
ls=[123,"456",789,"123",456,"789"]
请补充如下代码，求其各整数元素的和。
ls=[123,"456",789,"123",456,"789"]
s=0
for item in ls:
if
① ==type(123):
s+
② print(s)
【正确答案】ls=[123,"456",789,"123",456,"789"]
s=0
for item in ls:
if type(item)==type(123):
s+=item
print(s)
【答案解析】