Switch case with multiple values for the same case

Question

I would like to know the syntax to set a multiple case statement in a switch / case.
For example :

String commentMark(int mark) {     switch (mark) {         case 0 : // Enter this block if mark == 0             return "Well that's bad" ;         case 1, 2, 3 : // Enter this block if mark == 1 or mark == 2 or mark == 3             return "Gods what happend" ;         // etc.         default :             return "At least you tried" ;     } } 

I cannot find the right syntax to set multiple case (the line case 1, 2, 3 :), is it even possible in Dart ?

I did not found any informations on pub.dev documentation, neither on dart.dev.

I tried :
case 1, 2, 3
case (1, 2, 3)
case (1 ; 2 ; 3)
case (1 : 2 : 3)
case 1 : 3
and more !

Answer 1

Execution continues until it reaches a break;. Therefore, you can list cases one after the other to get the following code execute on either one of those cases.

String commentMark(int mark) {     switch (mark) {         case 0 : // Enter this block if mark == 0             return "mark is 0" ;         case 1:         case 2:         case 3: // Enter this block if mark == 1 or mark == 2 or mark == 3             return "mark is either 1, 2 or 3" ;         // etc.         default :             return "mark is not 0, 1, 2 or 3" ;     } }  

The return statements above serve to get out of the function. If you do not want to return, you have to use break; after each block, of course. This code below is equivalent to the one above.

String commentMark(int mark) {     String msg;     switch (mark) {         case 0 : // Enter this block if mark == 0             msg = "mark is 0" ;             break;         case 1:         case 2:         case 3: // Enter this block if mark == 1 or mark == 2 or mark == 3             msg = "mark is either 1, 2 or 3" ;             break;         // etc.         default:             msg = "mark is not 0, 1, 2 or 3" ;             break; // this is a good habit, in case you change default to something else later.     }     return msg; }