python if语句

if 语句用于有条件的执行。

语法：

if 表达式：执行语句

elif 表达式：执行语句

else：执行语句

应用范例：石头剪刀布

import random
player = int(input("请出拳 石头（1）／剪刀（2）／布（3）："))
computer = random.randint(1,3) 
print("你出的是：", end = "")
print(player)
print("电脑出的是：", end = "")
print(computer)
if ((player == 1 and computer == 2) or
        (player == 2 and computer == 3) or
        (player == 3 and computer == 1)):
    print("噢耶！！！电脑弱爆了！！！")
elif player == computer:
    print("心有灵犀，再来一盘！")
else:
    print("不行，我要和你决战到天亮！")