well, have grades database including student id registration, i'm stuck since have code loops , arrays. know easy me use classes teacher wants loops :/ where i'm stuck @ first case on switch,i have ask student id , validate if it's in array belongs id, tried using 2 do while loops , worked while if it's in array id put in array anyway. tried asking teacher said have seen loops in class , should able without help. i'm pretty sure saw basic examples of loops, not kind of thing have compare 2 arrays. appreciate help, , sorry bad english. reading post. public class reg_al { public static void main(string[] args) { scanner sc = new scanner(system.in); string evaluation[] = {"id", "group", "exam 1", "exam 2", "exam 3"}; int data[][] = new int[10][6]; int opc, x, = 0; boolean b = true, = false; { system.out.println("uanl-fcfm"); ...