#加法
a = 1 + 1
#减法
b = 2 - 1
#乘法
c =2*2
#除法
d = 8 / 3
#取余
e = 8 % 3
#取商
f = 8 // 3
#次方运算
g = 2 ** 2

a=a+2
a=a-2
a=a*2

a = 1 > 5
b = 1 < 5
print(a) #返回False
print(b) #返回True

a = 1 > 5 or 5 > 2
b = 1 < 5 and 2 > 5
print(a)  # 返回True
print(b)  # 返回False

a = "中国" in "我爱你中国"
b = "中国" not in "我爱你中国"
print(a)    #True
print(b)    #False