Pascal (and Ada) actually expects you to specify the both the first and last index foo[1..10] or foo[0..9] are both valid arrays (though I believe 1 is the trad

Pascal (and Ada) actually expects you to specify the both the first and last index foo[1..10] or foo[0..9] are both valid arrays (though I believe 1 is the traditional first index) which is handy when you do run into situations where one or the other is a poor fit for an algorithm.