print(3 == 3) # 判断相等
print(3 != 3) # 判断不相等
print(3 >= 2)
print(3 <= 3)
print(3.0 == 3)
print(True == False)
print('hello' < 'hello') # 字符串的比较运算：每个字符的ascii码值
print(ord('h'))
print(ord('a'))
print(ord('A'))
print(1<2<3)
print(1<2 and 2<3)