Can we use variables in switch case Java?

The switch/case statement in the c language is defined by the language specification to use an int value, so you can not use a float value . The value of the ‘expression’ in a switch-case statement must be an integer, char, short, long. Float and double are not allowed.

Yes , we can use a switch statement with Strings in Java. … The expression in the switch cases must not be null else, a NullPointerException is thrown (Run-time). Comparison of Strings in switch statement is case sensitive.

Anyway. Second, the only way to use switch with multiple variables is to combine them into one primitive (string, number, etc) value: var stateA = “foo”; var stateB = “bar”; switch (stateA + “-” + stateB) { case “foo-bar”: … … }

Java Program to Swap two Variables

Variables are not allowed . The break statement is used inside the switch to terminate a statement sequence. The break statement is optional. If omitted, execution will continue on into the next case.19 Şub 2022

Declaring a variable inside a switch block is fine . Declaring after a case guard is not.