The product of all natural numbers up to given natural number is called factorial . In maths, factorial is represented with the symbol ! . See the below examples.
4! = 4*3*2*1 = 24
5! = 5*4*3*2*1 = 120
Now, we are going to write a program to print factorial of given Integer
import java.util.Scanner;
public class Factorial {
public static void main(String[] args) {
System.out.println("Please Enter Number: ");
Scanner read = new Scanner(System.in);
int a = read.nextInt();
int result = 1;
for (int i = 1; i <= a; i++) {
result = result * i;
}
System.out.println("The factorial of "+a+" is : " + result);
}
}