no other cases are left, because there is a limited set of values that enter the switch case.But this might change with time (intentionally or accidentally), and it would be good to have a default case if anything changes you could log or warn the user about a wrong value. There is no limit to the number of cases in a switch case block. The switch case statement also provides a default label, which is executed if none of the other case labels match the variable’s value. It seems there are three cases when a default statement is not necessary.
#Switch case java code#
Each case label is followed by a block of code to be executed if the variable’s value matches the value specified in the case label. The value of the expression is compared with the values of each case. In computer programming languages, a switch statement is a type of selection control mechanism used to allow the value of a variable or expression to change. The statement consists of the keyword “switch” followed by the variable or expression in parentheses and a series of “case” labels that represent possible values of the variable or expression. The switch case statement in Java is a branching construct that allows selecting one of several possible execution paths based on the value of a single variable or expression.
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