range

# i = 1
# while i <=100:
#     print(i)
#     i += 1#  range(参数)  [0,参数)
# for i in range(20): #  range()可以被迭代 0-9
#     print(i)# range(参数1, 参数2)  [参数1, 参数2) 切片
# for i in range(10, 20):
#     print(i)# range(参数1, 参数2, 参数3)  [参数1, 参数2) 每隔参数3个位置取一个
# for i in range(10, 20, 3):
#     print(i)# lst = ["周杰伦", "动画城", "大风车", "随便加", "宝宝", "孟孟", "萌萌", "孟萌"]# for item in lst: # 只能拿到元素. 获取不到索引
#     print(item)# for i in range(len(lst)): # i就是索引 lst[i]元素
#     print(i, lst[i])