Topic name should be [understanding "And"], can't I change it? I heard that in other languages like C it's in general like this (or only with code optimization, i don't know), that only so many conditions connected with "And" are checked, until one condition is not met. Example: If $a = 1 And $b = 2 And $c = 3 And $d = 5 Then ... EndIf Are all 4 variables checked here always? Or only until one condition is not true? If, then from which side? From left to right (first $a, then $b...) or from