C Interview Questions and Answers

 

Which is more efficient, a switch statement or an if else chain?

The differences, if any, are likely to be slight. The switch statement was designed
to be efficiently implementable, though the compiler may choose to use the equivalent
of an if/else chain (as opposed to a compact jump table) if the case labels are
sparsely distributed.



Do use switch when you can: it's certainly cleaner, and perhaps more efficient
(and certainly should never be any less efficient).

Posted by:Richards