C IF X = X
/free
if a = a; // always true
doZ();
endif;
if a <> a; // always false
doY();
endif;
if a = b and a = b; // if the first one is true, the second one is too
doX();
endif;
if a = b or a = b; // if the first one is true, the second one is too
doV();
endif;
j = 5 / 5; //always 1
k = 5 - 5; //always 0
/end-free