Question

(a)How many times does the code snippet given below display "Hello"?

int x = 1;

while (x != 15)

{

   System.out.println ("Hello");

   x++;

}

(b)What is the output of the following code fragment?

int i = 1;

int sum = 0;

while (i <= 5)

{

   sum = sum + i;

   i++;

}

System.out.println("The value of sum is " + sum);

Quie 2

What is the output of the following snipped code?

public class Test {

   public static void main(String args[]) {

      int x = 45;

      int y = 10;

      if( x == 30 ) {

         if( y == 10 ) {

            System.out.print("X = 30 and Y = 10");

         else

            System.out.print("X = 45 and Y = 10");

         }

       }

       System.out.print("Nested If");

If the user enter 2000, what is the output of the code segment shown below?

public class Leapyear{

   public static void main(String[] args)   {

      int year;   

      Scanner console = new Scanner(System.in);

      System.out.print("Enter a year : ");

      year = console.nextInt();

      if (year % 4 == 0)      {

         if (year % 100 == 0) {

            if (year % 400 == 0) {

               System.out.println("A leap year");

            }

            else            {

               System.out.println("Not a leap year");

            }

         }

         else         {

            System.out.println("A leap year");

         }

      }

      else      {

         System.out.println("Not a leap year");

      }   } }

qstion Three

What is the output of:

for (int i=1; i <= 5; i++)

                                {

                                                for (int j=1; j <= 5; j++)

                                                                System.out.print (i*j + " ");

                                                System.out.println();

  

Answer 1

Dear Student,

Here i have written complete Java code with the outputs KIndly Check it.

NOTE: Please note that all the program has been compiled and check using an online compiler.

Question No: 1

Program:a

---------------------------------------------------------------------------------------------------------------------------------------

public class Test

{
  
    public static void main(String []arg)
    {
      
    int x = 1;

    while (x != 15)

    {

    System.out.println ("Hello");

    x++;

    }

}

  
}

----------------------------------------------------------------------------------------------------------------------------------------

Output: Print Hello 14 times when the value of x is 15 program stops.below is the output.

Hello
Hello
Hello
Hello
Hello
Hello
Hello
Hello
Hello
Hello
Hello
Hello
Hello
Hello

----------------------------------------------------------------------------------------------------------------------------------------

Question No: 1

Program:b

----------------------------------------------------------------------------------------------------------------------------------------

public class Test

{
  
    public static void main(String []arg)
    {
      
    int i = 1;

    int sum = 0;

    while (i <= 5)

   {

   sum = sum + i;

   i++;

}

System.out.println("The value of sum is " + sum);

}

  
}

--------------------------------------------------------------------------------------------------------------------------------------

Output:2 The above program calculate the sum from 1 to 5 number and print the final result below is the output attached as a screen shot..

Output: The value of sum is 15

-----------------------------------------------------------------------------------------------------------------------------------------------

Question:2

Program:3

----------------------------------------------------------------------------------------------------------------------------------------------

import java.util.Scanner;

public class Leapyear{

   public static void main(String[] args)   {

      int year;

      Scanner console = new Scanner(System.in);

      System.out.print("Enter a year : ");

      year = console.nextInt();

      if (year % 4 == 0)      {

         if (year % 100 == 0) {

            if (year % 400 == 0) {

               System.out.println("A leap year");

            }

            else            {

               System.out.println("Not a leap year");

            }

         }

         else         {

            System.out.println("A leap year");

         }

      }

      else    
      {

         System.out.println("Not a leap year");

      }
     
   }

}

---------------------------------------------------------------------------------------------------------------------------------------

If you run the above code you will get the output as given below..If input is 2000.

Output:

Input: 2000 > Run > Run-URL(Also Generates URL) Output: Enter a yearA leap year

So 2000 is a leap year.

--------------------------------------------------------------------------------------------------------------------------------------------

Question:2:

Program:1

-----------------------------------------------------------------------------------------------------------------------------------------

public class Test {

   public static void main(String args[]) {

      int x = 45;

      int y = 10;

      if( x == 30 ) {

         if( y == 10 ) {

            System.out.print("X = 30 and Y = 10");

         else

            System.out.print("X = 45 and Y = 10");

         }

       }

       System.out.print("Nested If");

----------------------------------------------------------------------------------------------------------------------------------------

Output: When you run the above program it results some syntax error. That are shown in the below attached screen shot.

Compile Errors and Warnings: 15: error 'else' without 'if' else 23: error: reached end Of fl↓e whi↓e parsınd System.out.print("Nested If") 2 errors Output: No Output

----------------------------------------------------------------------------------------------------------------------------------------------

Question No:3

Program:1 below is the correct code snippet

---------------------------------------------------------------------------------------------------------------------------------------------

public class Test {

   public static void main(String args[]) {

      for (int i=1; i <= 5; i++)

    {

    for (int j=1; j <= 5; j++)
  
    System.out.print (i*j + " ");

    System.out.println();
    }
  
   }

}

---------------------------------------------------------------------------------------------------------------------------------------

Here i have attached the output as a screen shot...

Output:

----------------------------------------------------------------------------------------------------------------------------------------

Output: 1 234 5 246810 3 69 12 15 4 8 12 16 20 5 10 15 20 25

-------------------------------------------------------------------------------------------------------------------------------------------

KIndly Check and Verify Thanks...!!!