Python--循环--for && while

for循环示例：猜数字游戏

 winning_number = 38
 for i in range(3):
     guess_num = int(input("guess num:") )
     if guess_num == winning_number :
         print("yes, you got it. ")
         break
     elif guess_num < winning_number:
         print("think smaller...")
     else:
         print("think bigger!")
 else:
     print("you have tried too many times..")

while循环示例：死循环

 count = 0
 while True:
     print("I love You!!!---%d" %(count))
     count += 1
     if count > 999:
         break

while循环示例：猜数字游戏

 winning_number = 38
 count = 0
 while count <3:
     guess_num = int(input("guess num:") )
     if guess_num == winning_number :
         print("yes, you got it. ")
         break
     elif guess_num < winning_number:
         print("think smaller...")
     else:
         print("think bigger!")
     count +=1
 else:
    print("you have tried too many times..")

while循环升级：根据用户输入来决定是否终止游戏

 winning_number = 38
 count = 0
 while count <3:
     guess_num = int(input("guess num:") )
     if guess_num == winning_number :
         print("yes, you got it. ")
         break
     elif guess_num < winning_number:
         print("think smaller...")
     else:
         print("think bigger!")
     count +=1
     if count == 3:
         countine_confirm = input("do you want to keep guessing..?")
         if countine_confirm != 'n':
             count =0