There are two ways of implementing switch-case statements, both given above.
The above two implementations are equivalent except that in the first case all the jumps are short jumps while in the second case they are long jumps. However, many machines provide the n-way branch which is a hardware
instruction. Exploiting this instruction is much easier in the second implementation while it is almost impossible in the first one. So, if hardware has this instruction the second method is much more efficient.
