python之for (循环)

格式:

for 循环

for i in s:
     print(i)

# for 关键字
# i 变量
# in 关键字
# s 可迭代对象  int - bool

pass和…

# for a in "alex":
#     print(a)
#     # pass  # 过 -- 占位符
#     # ...   # 过
# print(a)