链接: https://pan.baidu.com/s/1wS_Kks5gvZTrgxv1FWzIlg 密码: cc8x
def strFind(s, sub, start, end):
pass
def add(x, y = 100): # 有預設值放在最後
return x + y
c = add(10)
print("c", c)
c = add(10, 15)
print("c", c)
s = "hello jeapedu.com"
# start = 0, end = len(str)
print(s.find("jeapedu"))
print(s.find("jeapedu", 7))