### Java Program to find Factorial of a Number using BigInteger - The Coding Shala

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In this post, we will learn how to find Factorial of a Number using BigInteger in Java.

## Java Program to find Factorial of a Number using BigInteger

We use int or long to store the result of factorial but long is also not enough to store the value of factorial of larger numbers, let's say n = 100 so in Java, we use BigInteger to store the factorial of large numbers.

**Example 1:**

Input: 30

Output: 265252859812191058636308480000000

**Java Program: **

// Java program to Find Factorial using BigInteger import java.util.Scanner; import java.math.BigInteger; public class Main { public static void main(String[] args) { Scanner sc = new Scanner(System.in); // take number input System.out.println("Enter the number"); BigInteger num = sc.nextBigInteger(); BigInteger fact = BigInteger.ONE; BigInteger i = BigInteger.ONE; // calculate factorial while(i.compareTo(num) <= 0) { fact = fact.multiply(i); i = i.add(BigInteger.ONE); } System.out.println("Factorial of " + num + " is: " + fact); sc.close(); } }

**Output: **

Enter the number 30 Factorial of 30 is: 265252859812191058636308480000000

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