Write a Java Program to find Factorial of Number – Java Tutorial
Problem Statement
Write a Java program to find the factorial of a number ‘n’ using for loop.
Solution:
First, create a main class named Factorial. Then add the main method to the main class Factorial.
Declare local variables such as n – to store the value of a number, fact = 1 (Initial factorial values).
Create an object of the scanner class and read a number using the scanner class object and the nextInt() method.
Next loop over from n to 1 and multiply n to partial; factorial in every iteration.
Finally, display the result (factorial of number).
/*
* Java Program to find the Factorial of a number
*
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*/
import java.util.Scanner;
public class Factorial
{
public static void main(String args[])
{
int n, fact = 1;
Scanner in = new Scanner(System.in);
System.out.println("Enter the value of n:");
n = in.nextInt();
for (int i = n; i>=1; i--)
{
fact = fact * i;
}
System.out.println("The factorial of "+n+" is "+fact);
}
}The output of the Factorial Program in Java
Enter the value of n: 5
The factorial of 5 is 120
Summary:
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