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Switch case without break statement

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As you already know the Switch statement in java, can contain any number of cases. Each case may or may not be followed by a break statement. Because the break statement is optional for each block. You can’t force the user to provide a break statement for each case. So in this article, we will read how behaves Switch case works without a break statement.

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Youtube video available in the Hindi language

Why is the break statement used?

The break statement is used inside the switch to terminate a statement sequence and jumps the control after the switch expression. Whenever a break statement is found in the Switch statement the control flow directly jumps out of the Switch statement.

NOTE: If a break statement is not used in any case the execution will continue into the next case until a break statement is reached. If no break statement is found in any case then it executes all the cases including the default case. It is also known as fall-through.

Syntax

switch(variable/expression)
 {
   case value1 :
      // code inside the case value1
      // Break is not used because it is optional
   
   case value2 :
      // code inside the case value2 
      // Break is not used because it is optional
    .
    .
    .
    default : 
           // code inside the default case.
}

In Syntax, you can see the break statement is optional. 

public class ExampleOfSwitch
{  
   public static void main(String[] args)
   {  
      //Declaring a variable for switch expression  
      int noOfDays = 28;  
      switch(noOfDays) //Switch expression  
      {  
   	 //Case statements  
   	 case 28: 
         System.out.println("Only February month has 28 days");  
         // NOTE: There is no break statement after the case 28
    	 case 30:
         System.out.println("April, June, August, October, December has 30 days");  
    	 break;  
   	
         case 31: System.out.println("January, March, May, July, September, November has  
                  31 days");  
    	 break;  
    	//Default case statement  
   	 default: System.out.println("Please enter valid no of days");  
      }  
   }  
}

Output: Only February month has 28 days
April, June, August, October, December has 30 days

Switch case without break statement

You can see in the example: Compiler doesn’t find the break statement after case 28 and it executes the next case also.

1. Quiz, Read the below code and do answer.

public class ExampleOfSwitch
{  
   public static void main(String[] args)
   {  
      //Declaring a variable for switch expression  
      int noOfDays = 28;  
      switch(noOfDays) //Switch expression  
      {  
      	 //Case statements  
   	 	 case 28: 
         System.out.println("Only February month has 28 days");  
         // NOTE: There is no break statement after the case 28
    	
   	 	 case 30:
         System.out.println("April, June, August, October, December has 30 days");  
    	 break;  
   	
         case 31: System.out.println("January, March, May, July, September, November has 31 days");  
    	 break;  
    	 //Default case statement  
         default: System.out.println("Please enter valid no of days");  
      }  
   }  
}

Click on anyone to know the answer.

2. Quiz, Read the below code and do answer.

public class ExampleOfSwitch
{  
   public static void main(String[] args)
   {  
      //Declaring a variable for switch expression  
      int noOfDays = 28;  
      switch(noOfDays) //Switch expression  
      {  
      	 //Case statements  
   	 	 case 28: 
         System.out.println("Only February month has 28 days");  
         // NOTE: There is no break statement after the case 28
    	 case 30:
         System.out.println("April, June, August, October, December has 30 days");  
   	
         case 31: System.out.println("January, March, May, July, September, November has 31 days");  
    	 //Default case statement  
         default: System.out.println("Please enter valid no of days");  
      }  
   }  
}

Click on anyone to know the answer.

3. Quiz, Read the below code and do answer.

public class ExampleOfSwitch
{  
   public static void main(String[] args)
   {  
      //Declaring a variable for switch expression  
      int noOfDays = 28;  
      switch(noOfDays) //Switch expression  
      {  
      	 //Case statements  
   	 	 case 28: 
         System.out.println("Only February month has 28 days");  
         // NOTE: There is no break statement after the case 28
    	 case 30:
         System.out.println("April, June, August, October, December has 30 days");  
   	
         case 31: System.out.println("January, March, May, July, September, November has 31 days");
         break;
    	 //Default case statement  
         default: System.out.println("Please enter valid no of days");  
      }  
   }  
}

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4. Quiz, Read the below code and do answer.

public class ExampleOfNestedSwitch
{
   public static void main(String[] args)
   {
      //Declaring a variable for switch expression
      int year = 2;
      int marks = 80;
      switch(year) //Switch expression
      {
         //Case statements
         case 1:
         System.out.println("First year students are not eligible for scholarship ");
         break;
         case 2:
         System.out.println("Second year students are not eligible for scholarship");
         case 3:
         switch(marks)
         {
            case 50:
            System.out.println("You are not eligible for scholarship");
            break;
            case 80:
            System.out.println("Congrats!!!!! you are eligible for scholarship");
            break;
         }
         break;
         //Default case statement
         default: System.out.println("Please enter valid year");
     }
   }
}

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