note 35853 deleted from function.bcmod by didou

Note Submitter: mackaye at iprimus dot com dot au ---- It is correct to use $i%2 to get even and odd program control HOWEVER using bit level operators is better, faster and more effecient so TO get odd and even $num&1 is much better To NULL any element $element^$element is also much better For New comers these functions are based on the binary representation of variables in memory. It so happens that an even number always has a 0 on the end, and an odd number always has a 1 on the end so 1010101 & 0000001 is true