typescripts swithc

1switch(expression) { 
2   case constant-expression1: { 
3      //statements; 
4      break; 
5   } 
6   case constant_expression2: { 
7      //statements; 
8      break; 
9   } 
10   default: { 
11      //statements; 
12      break; 
13   } 
14}