Java Switch Statement with suitable example

 Java Switch Statement 

In Java, the switch statement is used to execute one of several code blocks based on the value of a variable or expression. The syntax of the switch statement is as follows:

switch (expression) {
   case value1:
      // code block to be executed if expression equals value1
      break;
   case value2:
      // code block to be executed if expression equals value2
      break;
   .
   .
   .
   case valueN:
      // code block to be executed if expression equals valueN
      break;
   default:
      // code block to be executed if expression does not equal any of the values
}

Here, the expression is the variable or expression whose value is being compared, and each case label represents a value that the expression might equal. If the expression matches one of the values, the corresponding code block is executed. If none of the cases match, the code in the default block is executed.

The break statement is used to exit the switch statement after a code block has been executed. If the break statement is not used, the code will continue to execute until it reaches the end of the switch block or a break statement is encountered.

Here's an example of how the switch statement can be used in Java:

import java.util.Scanner;

public class Main {
   public static void main(String[] args) {
      Scanner input = new Scanner(System.in);

      System.out.print("Enter a number (1-3): ");
      int number = input.nextInt();

      switch (number) {
         case 1:
            System.out.println("You entered one.");
            break;
         case 2:
            System.out.println("You entered two.");
            break;
         case 3:
            System.out.println("You entered three.");
            break;
         default:
            System.out.println("Invalid number.");
            break;
      }
   }
}

In this example, the day variable is compared to the values in the switch statement, and the corresponding dayName string is assigned. Since day is equal to 3, the code block for case 3 is executed and the dayName variable is assigned the value "Wednesday". The break statement is used to exit the switch statement and prevent execution of the other code blocks. Finally, the value of dayName is printed to the console