AND function    

juxtaposition (putting variables next to each other with no intervening symbol)

 

						|	0	1
_____	_____	___	_____		____	___	____	____
0	0	|	0		0	|	0	0
0	1	|	0		1	|	0	1
1	0	|	0
1	1	|	1

Rules to remember

0žx = xž0 = 0

1žx = xž1 = x