python-if

_yourname = "ruijie"
yourname = input('yourname: ')

if  yourname == _yourname:
    print("nice")
else:
   print("error")

1、一个=等于为变量赋值,两个==为运算符号中的等于;
2、if 后的条件语句要加冒号:;
3、if语句中一定要注意缩进的量级,只有在同一量级的语句才会被包括在if语句中。

while
 
  
 1 age_of_oldboy=18
 2 
 3 count=0
 4 while count<3:
 5   guss_age = int(input("guss_age:"))
 6   if guss_age==age_of_oldboy:
 7      print("you are ringt")
 8      break
 9   elif guss_age>age_of_oldboy: 10 print("think small") 11 else: 12 print("think big") 13 count+=1 14 if count==3: 15 continue_comfirm=input("do you want to keep guessing....") 16 if continue_comfirm != "n": 17 count=0
 
 
 

1、count =count+1    与cont+=1;

2、print'hello {0} i am {1}'.format('ruijie','cisco')              

    # hello ruijie i am cisco

官方推荐用的方式,%方式将会在后面的版本被淘汰

 




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