第二讲：运算符

# -*- coding:utf-8 -*-
# 运算符
# 算术运算符
a = 1
b = 2
print (a + b)
# print a - b
# print a * b
# print a / b
a = 1.0
print (a / b)  # --------------------------------------
# print a // b  # 你就当它是除法，取整（不四舍五入）就好
a = 2
# print a ** b  # a的b次方
a = 6
b = 4
# print a % b
a = 1
b = 2
# print a > b
# print a < b
# print a >= b
# print a <= b
# print a == b
# 逻辑运算符
#   and          &&
#   or          ||
#   not          !
#   in          在指定容器里找到返回true 否则false
#   not in      在指定容器里未找到返回true 否则false
user_name = "alan"
passward = "123456"
if user_name == "alan" and passward == "123456":
    print ("success")
else:
    print ("false")