Page 197 - ComputerScience_Class_11

Nested switch case
When a switch case is used inside another switch case, then it is known as a nested switch case.

For example,
Write a Java program that uses a nested 'switch' statement. The program should prompt
Program 3
the user to enter an integer ('ch1') and a character ('ch2'). Based on the integer input, the
program should evaluate a nested 'switch' for the character input.
• If the integer is '1', the inner 'switch' should check if the character is 'B', 'C' or 'D' and print
the corresponding message.
• If the integer is '2', the program should print "The choice is 2".
• If the integer is '3', the program should print "The choice is 3".
• If the input doesn't match any of the cases, print "Wrong choice".
1 import java.util.*;
2 class nestedswitch

3 {
4 public static void main(String[] args)

5 {
6 Scanner sc = new Scanner(System.in);
7 int ch1;
8 char ch2;

9 System.out.println("Enter number ch1 and character ch2");
10 ch1 = sc.nextInt();

11 ch2 = sc.next().charAt(0);
12 // Starting of Outer Switch
13 switch(ch1)
14 {

15 case 1:
16 // Starting of Inner Switch

17 switch (ch2)
18 {
19 case 'B': System.out.println("The choice is B");
20 break;

21 case 'C':
22 System.out.println("The choice is C");

23 break;
24 case 'D':
25 System.out.println("The choice is D");
26 break;

27 }

Statements and Scope 195