Simple Java program to find Factorial of a number

The Java code below shows how to get the factorial of numbers. For instance 4! = 4 x 3 x 2 x 1 = 24.

Since Zero factorial is defined to be one, i.e. 0! = 1, the loop starts from 1.

The code below calculates the factorial of numbers from 1 to 10.

public class DisplayFactorial{
    public static void main(String[] args){
	int j = 1;

	System.out.println("0! = " + 1);

	for(int i=1; i<10; i++){
	    j = j *i;
	    System.out.println(i + "! = " + j);

	}

    }
}

 

When we run the program we will get output similar to the following:
0! = 1
1! = 1
2! = 2
3! = 6
4! = 24
5! = 120
6! = 720
7! = 5040
8! = 40320
9! = 362880
10! = 3628800