example, to see if var1 is bigger than var2:
whichisbigger:
ld a,(var2)
ld b,a ;var2 is in 'b'
ld a,(var1) ;var1 is in 'a'
cp b ;a minus b or var1-var2
jp c,var2bigger
var1bigger:
..... code .....
var2bigger:
..... code .....
.end
END