Day 4 20190119 老男孩python学习第4天 内容整理

while 条件：
执行代码

a = -1
while a < 100:
a += 1
print(a)

a = 0
while a <= 100:
print("loop ", a)
a += 1

print("-----loop is ended----")

a=0
while a <= 100:
print("double ", a)
a += 2

print("-----loop is ended----")

a = 1
while a <=100:
if a == 50:
pass
elif a >= 60 and a <= 80:
b = a**2
print("the square of loop is ", b)
else:
print("loop ", a)

a += 1

print("------loop is ended-----")

猜年龄游戏：

# age = 48
# trial_number = 1
# while trial_number <=3:
# userguess = int(input("your guess:"))
# if userguess == 48:
# print("恭喜你猜对了!")
# break
# elif userguess >= 0 and userguess < 48:
# print("try bigger")
# elif userguess < 0:
# print("please enter a valid age number")
# else:
# print("try smaller")

# trial_number_left = 3 - trial_number
# if trial_number_left == 0:
# print("对不起，系统检测到您的猜测次数已经用完，请充值后再试")
# else:
# print("你还剩下", trial_number_left, "次机会")
# trial_number += 1

# print("游戏结束")

age = 48
trial_number = 1
while trial_number <=3:
userguess = int(input("your guess:"))
if userguess == 48:
print("恭喜你猜对了!")
break
elif userguess >= 0 and userguess < 48:
print("try bigger")
elif userguess < 0:
print("please enter a valid age number")
else:
print("try smaller")

trial_number_left = 3 - trial_number
if trial_number_left == 0:
willing_to_go_on = input("对不起，系统检测到您的猜测次数已经用完，您还要重新玩一次吗?")
if willing_to_go_on == "y":
trial_number = 1
continue  #此句不需要
else:
print("你还剩下", trial_number_left, "次机会")
trial_number += 1

print("游戏结束")