Or operation: any value is ORed with 0 , keep the original value ;
Any value is ORed with 1 , the result is 1 ;
Or operation: AND any value with 1 , keep the original value ;
Any value is ANDed with 0 , the result is 0 ;
Or operation: any value is ORed with 0 , keep the original value ;
Any value is ORed with 1 , the result is 1 ;
Or operation: AND any value with 1 , keep the original value ;
Any value is ANDed with 0 , the result is 0 ;