# range()
# for i in range(100): # 0-9
# print(i)
# for i in range(3, 8): # 从3-8 没有8
# print(i)
# for i in range(5, 10, 2): # 从5 到 10 步长是2
# print(i)
# range(边界) 从0到这个边界
# range(start, end) 从start到end结束. 不能到end
# range(start, end, step) 从start到end. 步长是step
# lst = ["张无忌", "张三丰", "张翠山", "张一山", "张磊", "张伟", "张角"]
# # for el in lst: # 这样循环. 没有索引
# # print(el)
#
# for i in range(len(lst)): # 有索引了
# print(lst[i])
# tu = ("首页", "登录", "注册", "购物", "退出")
# for i in range(len(tu)):
# print(i,tu[i])