Java Switch Case

switch-case: The switch statement is a multiway branch statement. It provides an easy way to dispatch execution to different parts of code based on the value of the expression. 

Syntax: 

switch (expression)
{
  case value1:
    statement1;
    break;
  case value2:
    statement2;
    break;
  .
  .
  case valueN:
    statementN;
    break;
  default:
    statementDefault;
}

• There can be one or N number of case values for a switch expression.
• The case value must be of switch expression type only. The case value must be literal or constant. It doesn't allow variables.
• The case values must be unique. In case of duplicate value, it renders compile-time error.
• Each case statement can have a break statement which is optional. When control reaches to the break statement, it jumps the control after the switch expression. If a break statement is not found, it executes the next case.
• The case value can have a default label which is optional.

 Example

package com.practice;

class SwitchStatement {

	public static void main(String[] args) {
		char ch='D';    
	    switch(ch)  
	    {  
	        case 'a':   
	            System.out.println("Vowel");  
	            break;  
	        case 'e':   
	            System.out.println("Vowel");  
	            break;  
	        case 'i':   
	            System.out.println("Vowel");  
	            break;  
	        case 'o':   
	            System.out.println("Vowel");  
	            break;  
	        case 'u':   
	            System.out.println("Vowel");  
	            break;  
	        case 'A':   
	            System.out.println("Vowel");  
	            break;  
	        case 'E':   
	            System.out.println("Vowel");  
	            break;  
	        case 'I':   
	            System.out.println("Vowel");  
	            break;  
	        case 'O':   
	            System.out.println("Vowel");  
	            break;  
	        case 'U':   
	            System.out.println("Vowel");  
	            break;  
	        default:   
	            System.out.println("Consonant");  
	    }  

	}

}
 

Output

Consonant