Question

10) Write the one line of code to find this |-13.75| = 13.75

11) Write a function declaration for a function called Diff that takes two agruements of type int returns the difference of the two integers.

12) Write a main function which calls the above function and display the difference returned by the Diff function.

13) We need three functions

One which is taking length, width, and height to calculate volume of Rectangular prism and returns a double value.

One which is taking an int value and returns true it is multiple of 5. (Bool function)

One which is not taking no arguement but ask the user’s response for a rating. (User’s response should be a character)

It should return that character of user’s choice.

(a) Give the function declaration for the above 3 conditions

(b) Make function calls inside main for each of the above 3 functions.

Help is needed, please and thank you!

Answer 1

10.

System.out.println("Value of |-13.75| is " + Math.abs(-13.75));

PROGRAM IMPLEMENTATION

import java.lang.*;
public class demo
{

public static void main(String[] args)
{

System.out.println("Value of |-13.75| is " + Math.abs(-13.75));

}
}

OUTPUT

11)

public static int diff(int a, int b)
{
return a-b;
}

12. program IMPLEMENTATION

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

public class demo
{

public static int diff(int a, int b)
{
return a-b;
}
public static void main(String[] args)
{
int x,y;

Scanner sc = new Scanner(System.in);//declare the scanner object
//input the value of x
System.out.println("Enter X value :");
x = sc.nextInt();
//input the value of y
System.out.println("Enter Y value :");
y = sc.nextInt();
//DISPLAY THE DIFFERENCE
System.out.println("Difference of "+x+" and "+y+ " is "+diff(x,y));

}
}

OUTPUT

13.

//area method takes three parameters and find the area of rectangular prism
public static double area(double len,double wid, double height)
{
double area;
area= 2*(wid*len + height*len + height*wid);
return area;
}

//check method will return true if number is multiple of 5 otherwise returns false.
public static boolean check(int a)
{
if(a%5==0)
return true;
else
return false;
}

//rating method will return a character for rating
public static char rating()
{
Scanner sc = new Scanner(System.in);//declare the scanner object
char c;
System.out.println("Enter the rating(E/O/G/N)");
c = sc.next().charAt(0);
return c;
}

PROGRAM IMPLEMENTATION

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

public class demo
{

//check method will return true if number is multiple of 5 otherwise returns false.
public static boolean check(int a)
{
if(a%5==0)
return true;
else
return false;
}
//rating method will return a character for rating
public static char rating()
{
Scanner sc = new Scanner(System.in);//declare the scanner object
char c;
System.out.println("Enter the rating(E/O/G/N)");
c = sc.next().charAt(0);
return c;
}
//area method takes three parameters and find the area of rectangular prism
public static double area(double len,double wid, double height)
{
double area;
area= 2*(wid*len + height*len + height*wid);
return area;
}

public static void main(String[] args)
{
int x,y;
char c;
double l,w,h;

Scanner sc = new Scanner(System.in);//declare the scanner object

//input the value of x
System.out.println("Enter X value :");
x = sc.nextInt();
//check whether x is multipleof 5 or not
if(check(x))
System.out.println(x+" is multiple of 5");
else
System.out.println(x+" is not multiple of 5");

System.out.println("Your rating is "+ rating());

System.out.println("Enter the length of rectangular prism");
l = sc.nextDouble();

System.out.println("Enter the width of rectangular prism");
w = sc.nextDouble();

System.out.println("Enter the height of rectangular prism");
h = sc.nextDouble();

System.out.println("Area of rectangular prism is : "+ area(l,w,h) + "Sq. Units.");

}
}

OUTPUT