if 1          then print "1 is true"
if not(0)     then print "0 is false"
if 1 < 2      then print "1 < 2 TRUE"
if 2 > 1      then print "2 > 1 TRUE"
if not(2 < 1) then print "2 not < 1"
if not(1 = 0) then print "1 not = 0"