Answered: In Java Write a Java Program to find…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

In Java

Write a Java Program to find the factorial of a number. The factorial of nonnegative integer n (denoted by n!) is the product of all positive integers less than or
equal to n. Example: 4! = 4 × 3 × 2 × 1 = 24. The value of 1! Is 1 and the value of
0! Is 1 too. Do not accept negative numbers.
Sample Run:
Enter a positive integer: -1
Invalid entry.
Enter a positive integer: -15
Invalid entry.
Enter a positive integer: 5
Factorial of 5 = 120

Expert Solution

Explanation

1) Below is JAVA program to find the factorial of a number

In main method of program it declare variables num and fact
It creates a scanner object to read user inputs
Read user input until user enters a positive integer
- if user enter negative number, display invalid message and ask user to enter number again
Calculate the factorial of number using for loop which calculates product of all positive integers less than number
Display factorial of number

2) Save program in Factorial.java file build and run

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