#!/usr/bin/env python
# -*- coding:utf8 -*-
#input只接收字符串，需转化字符类型方可运算
 inp = input ("number: ")
 new_inp = int(inp)
 while new_inp == 10:
     num = new_inp + 90
     print (num)
     break
 else:
     print ("请输入数字10！")
#continue终止当前循环，break跳出整个循环
 count = 0
 while count < 10:
     if count == 7:
         count = count + 1
         continue
     print (count)
     count = count + 1
#in ,not in用法
name = "我的世界"
if "世界" in name:
    print(‘ok‘)
elif "阿坤" not in name:
    print (‘nonull‘)
else:
    print(‘null‘)