Introduction to Java Programming and Data Structures, Comprehensive Version (11th Edition)
Introduction to Java Programming and Data Structures, Comprehensive Version (11th Edition)
11th Edition
ISBN: 9780134670942
Author: Y. Daniel Liang
Publisher: PEARSON
Question
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Chapter 18, Problem 18.1PE
Program Plan Intro

Factorial

Program plan:

  • Import required packages
  • Declare the main class named “Main”.
    • Give the main method “public static void main ()”
      • Create an object “sc” for the scanner class.
      • Get a number from the user and store it in a variable “numberString”.
      • Create an object “bigNum” for the static method “BigInteger”.
      • Print the output.
    • Give function definition for the static method “factorial ()”.
      • Check if the value is equal to zero.
        • Return 1.
      • Else,
        • Call the function “factorial ()” recursively until the result is found.

Expert Solution & Answer
Check Mark
Program Description Answer

The below program is used to find the factorial for the given number using “BigInteger” class.

Explanation of Solution

Program:

//Import required packages

import java.math.*;

import java.util.*;

//Class name

public class Main

{

//Main method

public static void main(String[] args)

{

//Create an object for Scanner

Scanner sc = new Scanner(System.in);

//Print the message

System.out.print("Enter an integer of any size: ");

//Get the string from the user

String numberString = sc.nextLine();

//Create an object for the static method

BigInteger bigNum = new BigInteger(numberString);

//Print the output

System.out.println("Factorial of " + bigNum + " is " + factorial(bigNum));

}

//Static method "factorial"

public static BigInteger factorial(BigInteger value)

{

//Check if the value is equal to zero

if (value.equals(BigInteger.ZERO))

//Return 1

return BigInteger.ONE;

//Else

else

/*Call the function recursively to till the result is found*/

return value.multiply(factorial(value.subtract(BigInteger.ONE)));

}

}

Sample Output

Enter an integer of any size:  50

Factorial of 50 is 30414093201713378043612608166064768844377641568960512000000000000

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Chapter 18 Solutions

Introduction to Java Programming and Data Structures, Comprehensive Version (11th Edition)

Ch. 18.4 - Prob. 18.4.2CPCh. 18.4 - Prob. 18.4.3CPCh. 18.5 - Prob. 18.5.1CPCh. 18.5 - Prob. 18.5.2CPCh. 18.5 - What is a recursive helper method?Ch. 18.6 - Prob. 18.6.1CPCh. 18.6 - How does the program get all files and directories...Ch. 18.6 - How many times will the getSize method be invoked...Ch. 18.6 - Will the program work if the directory is empty...Ch. 18.6 - Will the program work if line 20 is replaced by...Ch. 18.6 - Will the program work if lines 20 and 21 are...Ch. 18.7 - Prob. 18.7.1CPCh. 18.8 - Prob. 18.8.1CPCh. 18.8 - Prob. 18.8.2CPCh. 18.8 - How many times is the displayTriangles method...Ch. 18.8 - Prob. 18.8.4CPCh. 18.8 - Prob. 18.8.5CPCh. 18.9 - Which of the following statements are true? a. Any...Ch. 18.9 - Prob. 18.9.2CPCh. 18.10 - Identify tail-recursive methods in this chapter.Ch. 18.10 - Rewrite the fib method in Listing 18.2 using tail...Ch. 18 - Prob. 18.1PECh. 18 - Prob. 18.2PECh. 18 - (Compute greatest common divisor using recursion)...Ch. 18 - (Sum series) Write a recursive method to compute...Ch. 18 - (Sum series) Write a recursive method to compute...Ch. 18 - (Sum series) Write a recursive method to compute...Ch. 18 - (Fibonacci series) Modify Listing 18.2,...Ch. 18 - Prob. 18.8PECh. 18 - (Print the characters in a string reversely) Write...Ch. 18 - (Occurrences of a specified character in a string)...Ch. 18 - Prob. 18.11PECh. 18 - (Print the characters in a string reversely)...Ch. 18 - (Find the largest number in an array) Write a...Ch. 18 - (Find the number of uppercase letters in a string)...Ch. 18 - Prob. 18.15PECh. 18 - (Find the number of uppercase letters in an array)...Ch. 18 - (Occurrences of a specified character in an array)...Ch. 18 - (Tower of Hanoi) Modify Listing 18.8,...Ch. 18 - Prob. 18.19PECh. 18 - (Display circles) Write a Java program that...Ch. 18 - (Decimal to binary) Write a recursive method that...Ch. 18 - (Decimal to hex) Write a recursive method that...Ch. 18 - (Binary to decimal) Write a recursive method that...Ch. 18 - (Hex to decimal) Write a recursive method that...Ch. 18 - Prob. 18.25PECh. 18 - (Create a maze) Write a program that will find a...Ch. 18 - (Koch snowflake fractal) The text presented the...Ch. 18 - (Nonrecursive directory size) Rewrite Listing...Ch. 18 - (Number of files in a directory) Write a program...Ch. 18 - (Game: Knights Tour) The Knights Tour is an...Ch. 18 - (Game: Knights Tour animation) Write a program for...Ch. 18 - (Game: Eight Queens) The Eight Queens problem is...Ch. 18 - Prob. 18.35PECh. 18 - (Sierpinski triangle) Write a program that lets...Ch. 18 - (Hilbert curve) The Hilbert curve, first described...Ch. 18 - (Recursive tree) Write a program to display a...Ch. 18 - Prob. 18.39PE
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