1、and
"And" if x is False, x and y returns False, else it returns evaluation of y.
10 <. 1 and . 3>. 1 # 10 <. 1 to False, so whole False --------------------------- False
10> 1 and 3> 1 # 10> 1 is True, so look Boolean 3> 1 and 3> 1 True, the overall value of True. --------------- -------------------------------------------------- ----------------------- True
2、or
"Or" if x is non-zero, it returns the value of x. Otherwise, it returns the calculated value of y.
10> 1 or . 3> 1. # 10> 1 bit True, the Boolean value 10 directly> 1. -------------------------------------------------- -------------- True
10 <1 or . 3> 1. # Because 10 <1 False, 3 return> Boolean value 1. -------------------------------------------------- --------------- True
3、not
"Non" - If x is True, it returns False. If x is False, it returns True.
not True -------------------------- False
4, the priority of logical operators
From left to right :()> not> and> or
计算：1>3 or 3>2 and 1=0 and not(7>2 or 3>5)
answer:
From left to right, first calculate (), the 7> 2 is True, then the parentheses is True, looking outside the parentheses not, then this part # is false.
And then to calculate the left and, 3> 2 is True, See the Boolean value 1 = 0, 1 = 0 to False, 3> 2 and 1 = 0 is #False.
recalculation 3> 2 and 1 = 0 and not (7> 2 or 3> 5), known 3> 2 and 1 = 0 is False, not (7> 2 or 3> 5) to False, 3> 2 and 1 = 0 and not (7> 2 or 3> 5) to False.
Finally, see 1> 3 False, 3> 2 and 1 = 0 and not (7> 2 or 3> 5) False, the whole False.