Java switch keyword is used to provide multiple branching in a program. It tests the value of a variable and compares it with multiple case values. If there is a match, the associated block of code is executed. The break keyword is used to terminate the switch statement and control passes to the next line of code after switch.
If none of the cases match the value of the variable, then the default label is executed. The default label must be present in every switch statement. If there is no default label, and if none of the cases match, then no action takes place and control passes to the next line of code after switch.
The syntax for using Java switch keyword is given below:switch(expression) {
case value1: //if expression == value1
//execute this block
break; //terminates this particular case
case value2: //if expression == value2
//execute this block
break; //terminates this particular case
//you can have any number of cases in a switch statement
default: //executes this block if no matching case is found }
how to use switch keyword
The switch keyword in Java is used to execute a block of code based on the value of a specified expression. The expression must be of type byte, short, char, or int. Each value is associated with a case label. When the expression's value matches the value associated with a case label, the block of code associated with that case label is executed. If no match is found, the default label is executed (if present).