运算符

# 运算符5大类
# 算术运算符 %
a = 1
b = 2
print(a + b)

# 模运算 取余运算
a = 5
print(a % 3)
# 判断奇偶 %2

# 赋值运算符 = += -=
a = 6  # =是赋值运算
a += 2  # a=a+2
print(a)
a -= 3
print(a)

# 比较运算符 >、 >=、 < 、<=、  !=、 ==
# 比较结果返回的值是布尔值 True False
a = 10
b = 5
print(a > b)
print(a >= b)
print(a < b)
print(a != b)
print(a == b)
print("get" == "GET")
print("get".upper() == "GET")
print("get" == "GET".lower())

# 逻辑运算符 and or 拓展not
# 逻辑运算返回值是布尔值

a = 10
b = 5
print(a > 11 and b > 6)
print(a + b)
print((a > 11) or (b > 4))

# 成员运算符 in 、not in
# 返回值也是布尔值
s = "hello"
print("o" in s)
print("o" not in s)
l = [1, 2, 3]
print(l)
print(1 in l)
d = {"age": 18, "name": "鸭蛋"}
print(d)
print("age" in d)  # 只能判断key，不能判断value