#算数运算符
#加法运算
#a = 5
#b = 3
#print(a + b)
#第二方法
#a += b
#print(a)
#第三种方法
#b1 = a + b
#print(b1)
#减法运算
# a = 6
# b = 3
#print(a - b)
# a -= b
# print(a)
# f1 = a - b
# print(f1)
# 乘法运算
# a = 6
# b = 3
#print(a * b)
# a *= b
# print(a)
# a1 = a * b
# # print(a1)
# 除法运算
# a = 6
# b = 3
# a / b
# print(a / b)
# 按位异或:^表示
# a = 15 #00001111
# b = 7 #000000111
# print(a ^ b)
# 右移动运算符>> 左移动运算符<<
# a = 15
# print(a >> 2)
#比较运算符:
# 返回的时布尔值:true:真和false:假
# a = 5
# b = 3
# print(a > b) #大于
# print(a < b) #小于
# print(a <= b) #小于等于
# print(a >= b) #大于等于
# print(a == b) #恒等
# print(a != b) #不等于
#逻辑运算符: AND OR NOT
# 返回的时布尔值
# a = 5
# b = 3
# c = 5
#AND 和
# print(a >b and a == c)
# print(a >b and a != c)
#OR 或者
# print(a >b or a == c)
# print(a #NOT相反的
# print(not a < b)
# print(not a > b)
# 成员运算符:
# in:在这个序列当中
# not in:不在这个序列当中
# 返回的也是布尔值 true false
str1 = "sssswwwaadff"
print("s" in str1)
print("l" in str1)
print("l" not in str1)