python 分支语句 循环语句

Posted 2020-09-08

分支语句

#if-else
    if a > b:
        print(‘aaa‘)
    else:
        print(‘bbb‘)

#if-elif-else
    if a > b:
        print(‘a>b‘)
    elif a == b:
        print(‘a==b‘)
    else:
        print(‘a<b‘)

循环语句

while 判断条件:
    执行语句

for temp in sequence:
    执行语句

#-*- coding:utf-8 -*-
for letter in ‘python‘:
　　print(‘current letter is %s‘%letter)

 

#-*- coding:utf-8 -*-
fruits = [‘banner‘,‘apple‘,‘orange‘]
for fruit in fruits:
     print(‘current fruit is %s‘%fruit)                                        

 

 

 Python中for else 语句 只要for循环语句不是通过break结束循环,那么无论for循环有没有执行,都会执行else里的语句. while ...else也是一样

 

break:跳出整个循环

continue:跳出本次循环,继续执行下一次循环