Java Program to Find the Factorial of a Large Number using BigInteger
In this video you will learn to write a Java Program to find the factorial of a Large number using Big Integer class.
The factorial of a positive integer n, which is denoted as n!, is the product of all positive integers less than or equal to n.
That is n! = n * (n-1)*(n-2)*....*3*2*1
So 4! = 4 * 3 * 2 * 1 which is equal to 24.
Factorial for the numbers 0 and 1 is 1. That is 0! = 1 and 1! = 1. For negative numbers factorial value doesn't exists.
In Java in the math package a class is available and it is called as Big Integer. It helps us to perform the calculations involving large integer numbers.
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