Python negative number remainder, divisible

Directly upload the code, the explanation is in the comments, if you don’t understand the comments, you must reply

print(11/2)     #5.5
print(11/-2)    #-5.5        
print(11//2)    #5
print(11//-2)   #-6     一正一负，-5 向下取整 = -6
print(11%2)     #1
print(11%-2)    #-1		一正一负，用公式：被除数-除数*商  在本题就是 11-（-2*（11//-2））=11-（-2*（-6））=-1