Ask the Expert - If/else or switch

Under what conditions should I use an if-else-if ladder instead of a switch when coding a multipath branch?

Answer:
In general, use an if-else-if ladder when the conditions controlling the selection process do not depend on a single value.

Example:

if(x < 10) // ...
else if(y != 0) // ...
else if(!done) // ...

This sequence cannot be recoded with a switch because all three conditions involve different variables – and different types. What variable would control the switch?
You will also have to use an if-else-if ladder when testing floating point values ​​or other objects that are not valid types in a switch expression.

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