Java Examples - Factorial
Java ExamplesThe factorial of a positive integer (English: factorial) is the product of all positive integers less than or equal to that number, and the factorial of 0 is 1. The factorial of a natural number n is written as n!.
That is, n! = 1×2×3×...×n. Factorial can also be defined recursively: 0! = 1, n! = (n-1)! × n.
The following example demonstrates the implementation of Java factorial code:
MainClass.java file
public class MainClass {
public static void main(String args[]) {
for (int counter = 0; counter <= 10; counter++){
System.out.printf("%d! = %d\n", counter,
factorial(counter));
}
}
public static long factorial(long number) {
if (number <= 1)
return 1;
else
return number * factorial(number - 1);
}
}
The output of running the above code is:
0! = 1 1! = 1 2! = 2 3! = 6 4! = 24 5! = 120 6! = 720 7! = 5040 8! = 40320 9! = 362880 10! = 3628800Other Extensions