标签:for循环 style 进入 语句 form tle enter user excel
if 条件1:
满足条件1,所执行的代码
elif 条件2:
满足条件2 ,所执行的代码
elif 条件3:
满足条件3,所执行的代码
else:
以上条件均不满足所执行的代码。
PS:if、elif、elif、else中的代码只有其中之一会被执行。例如:当不满足条件1而满足条件2时,会执行‘满足条件2 ,所执行的代码‘
当同时满足 条件1和条件2的时候,程序在执行完’满足条件1,所执行的代码‘时就结束了,不会执行条件2的代码。
score = 92 if score > 90: print(‘excelent!‘.title()) elif score > 80: print(‘good!‘.title()) else: print(‘shamed‘.title())
score = 92 PE_score = 80 if score > 90: print(‘excelent!‘.title()) if PE_score > 90: print(‘good at sports and sports‘.title()) elif score > 80: print(‘good!‘.title()) else: print(‘shamed‘.title())
while + Condition1:
Code1
满足Condition1时,将执行Code1。当Code1的代码都被执行完一遍后,将重新判断是不是满足Condition1。
count = 0 while count < 10: print(count) count += 1
将直接结束本层循环
count = 0 while count < 10: print(count) if count == 8: break count += 1
跳过本次循环。即continue后的语句都不会执行,将重新判断是否满足Condition1。
count = 0
while count < 10: print(count) if count == 8: continue # 进入到死循环,持续输出8 count += 1
db_username = ‘yyh‘ db_password = ‘1234‘ count = 0 while True: input_name = input(‘Enter your username:‘) input_password = input(‘Enter your password:‘) if input_name == db_username and input_password == db_password: print(‘Login in!‘) while True: cmd = input(‘>>>‘) if cmd != ‘quit‘: print(f‘run <{cmd}>‘) else: break break else: print(‘Wrong username or password!‘) count += 1 if count == 3: print(‘Your account is locked!‘) break
for element in iterable:
body
for循环给我们提供了不依赖索引的取值方式,适用于一切可迭代对象
略
for i in range(1, 10): for j in range(1,i+1): if j <= i: if i * j < 10: print(‘{0}*{1}={2}‘.format(j, i, i * j), end=‘ ‘) else: print(‘{0}*{1}={2}‘.format(j, i, i*j),end=‘ ‘) print()
打印99乘法表
标签:for循环 style 进入 语句 form tle enter user excel
原文地址:https://www.cnblogs.com/Ghostant/p/11792136.html