I cant understand this concept

Question

6//2?? 3%6?

Answer 1

first one is an error. and second one is used to find remainder.

Answer 2

// division then round to the nearest integer that is equal or smaller than the result. eg. 11//3==3, -11//3==-4
% gives the remainder of a division eg 11%3==2

Answer 3

@Nawaj Shareef: it is Python 3.5, not 1.x or 2.x (x < 5, maybe?)