Java Default Keyword

Default Keyword In Java

1. default is an optional part.

2. We can place the default anywhere inside the switch_case.
3. The switch compares the result of the integral selector to each integral value. If it finds a match, the corresponding statement (a single statement or multiple statements; braces are not required) executes. If no match occurs, the default statement executes.

4. You could put a break at the end of the default statement with no harm

Now we will see an example -

Example 1- Here is a simple example that uses a default statement

// web designing house
// online promotion house
// A simple example of the switch.
class Main{public static void main(String args[]) {
for(int i=0; i<6; i++)
switch(i) {
case 0:
System.out.println("i is zero.");
break;
case 1:
System.out.println("i is one.");
break;
case 2:
System.out.println("i is two.");
break;
case 3:
System.out.println("i is three.");
break;
default:
System.out.println("i is greater than 3.");
}
}
}

Output - Output will be -

i is zero.
i is one.
i is two.
i is three.
i is greater than 3.
i is greater than 3.

Example 2 - Here’s an example that takes day number as an input, and prints day name as an output -

import java.util.*;
public class VowelsAndConsonants { public static void main(String[] args) {
int dayno;
System.out.println("Input Day No : ");
Scanner ob = new Scanner(System.in);
dayno = ob.nextInt();
switch(dayno)
{
case 1:
System.out.println("Monday);
break;
case 2:
System.out.println("Tuesday ");
break;
case 3:
System.out.println("Wednesday ");
break;
case 4:
System.out.println("Thursday");
break;
case 5:
System.out.println("Friday ");
break;
case 6:
System.out.println("Saturday ");
break;
case 7:
System.out.println("Sunday ");
break;
default:
System.out.println("Invalid day number. \nPlease try again ....");
break;
}
}

Output-

Input Day No : 10

Invalid day number. \nPlease try again ....