Question

In java. Please explain. Consider the following program: } import java.util.*; public class Chapter7Ex12 { static Scanner console = new Scanner(System.in); public static void main(String[] args) { double num1; double num2; System.out.print("Enter two integers: "); num1 = console.nextInt(); num2 = console.nextInt(); System.out.println();

if (num1 != 0 && num2 != 0) System.out.printf("%.2f\n", Math.sqrt(Math.abs(num1 + num2 + 0.0))); else if (num1 != 0) System.out.printf("%.2f\n", Math.floor(num1 + 0.0)); else if (num2 != 0) System.out.printf("%.2f\n",Math.ceil(num2 + 0.0)); else System.out.println(0); }}

a. What is the output if the input is 12 4?

b. What is the output if the input is 3 27?

c. What is the output if the input is 25 0?

d. What is the output if the input is 0 49?

Answer 1

JAVA PROGRAM

import java.util.*;
import java.util.Scanner;

public class Chapter7Ex12
{
//scanner is class which helps in reeading a input from user
static Scanner console = new Scanner(System.in);
//main method
   public static void main(String[] args) {
//declaring variables which is a double type
   double num1;
   double num2;
   //prints the statement to enter two integers
   System.out.println("Enter two integers:");
   //when a user enter the first input it stores in num1 variable
   num1 = console.nextInt();
   //when a user enter the second input it stores in num2 varaible
   num2 = console.nextInt();
  
   System.out.println();
   //checks the conditon entered first input and second input which is not equal to 0 the if block is executed
   if(num1!=0 && num2!=0)
   //first it calculates the (num1+num2 )
   //second Math.abs(num1+num2) abs is a function which returns absolute value positive value ex: -177.89 it return 177.89
   //third Math.sqrt(Math.abs(num1+num2+0.0)) sqrt is function which returns the square of a number ex:16 square is 4
  
System.out.printf("%2f\n",Math.sqrt(Math.abs(num1+num2+0.0)));
//when a if block conditon fails else if block is executed
//checks the condition num1 varaible is equal to 0 or not
   else if(num1!=0)
   //prints the
   //first calculate the num1+0.0
   //math.floor(num1+0.0) Math.floor is function which does not return decimal points example :100.078 it returns only 100.0
   System.out.printf("%2f\n",Math.floor(num1+0.0));
   //when a if and upper else if block fails this else if is executed
   //checks the condition entered second value is not equal to 0
   else if(num2!=0)
   //prints the
   //first calculate the num2+0.0
   //math.ceil() is function which returns nearest value of a decimal value ex:4.7 nearest is 5 it returns 5
   System.out.printf("%2f\n",Math.ceil(num2+0.0));
   //when none of upper block is executed then this else block is executed
   else
   //prints the 0
   System.out.println(0);
   }
}

OUTPUTS

When Inout is 12 4

if block is executed because both input which is not equal to 0 which return the square root

12+4 = 16

16 square root is 4

when input 3 27

if block is executed because both input which is not equal to 0

3 + 27 = 30

30 square root is 5.47726

when input is 25 0

first

else if block is executed because first input which is not equal to 0

25+0 =25

when input is 0 49

2nd else if block is executed because first input is 0 if block fails and 1st else if block fails

second input 49 which is not equal to 0

0 +49 = 49

note : when if block is executed then no other else block is executed it checks the conditions if its meet then other block are not executed in case constion fails the other block will be executed

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