In Java, to check if a given number is positive or negative or 0 we can use conditional statements such as if-else or switch statement. For example, if input number is -5, then the resulting output should be “-5 is a negative number”. In this article, we will learn through an example, detailed logic and program explanation for better understanding.

The expression is evaluated once and compared with the values of each case. If expression matches with value1, the code of case value1 are executed. Similarly, the code of case value2 is executed if expression matches with value2 Note: The working of the switch-case statement is similar to the Java if...else...if ladder.

The break statement is used to terminate the switch-case statement. If break is not used, all the cases after the matching case are also executed. For example, public static void main(Stringargs) { int expression = 2; // switch statement to check size switch (expression) { case 1: System.out.println("Case 1"); // matching case case 2:

The break statement is used to exit from the switch block. It is optional but recommended to prevent fall-through. The default case is optional and executes if no case matches the switch expression. It can appear anywhere within the switch block. Note: Starting from Java 7, switch statements can use String type values.