Can we use loop in switch case?

SwitchVowelExample.java

Simple C Program of While Loop and Switch Case

No. It’s not possible because a case must be a constant expression.

A loop-switch sequence (also known as the for-case paradigm or Anti-Duff’s Device) is a programming antipattern where a clear set of steps is implemented as a switch-within-a-loop. The loop-switch sequence is a specific derivative of spaghetti code.