Problem Statement
You are given an integer N. Print the factorial of this number.
N!=N×(N−1)×(N−2)×⋯×3×2×1
Note: Factorials of N>20 can't be stored even in a 64−bit long long variable. Big integers must be used for such calculations. Languages like Java, Python, Ruby etc. can handle big integers but we need to write additional code in C/C++ to handle such large values.
We recommend solving this challenge using BigIntegers.
Input Format
Input consists of a single integer N.
Output Format
Output the factorial of N.
Sample Input
25
Sample Output
15511210043330985984000000
PROGRAM:-
import java.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;
public class Solution
{
public static void main(String[] args)
{
Scanner scn=new Scanner(System.in);
int n=scn.nextInt();
BigInteger factorial= BigInteger.ONE;
for (int i = 2; i <= n; i++)
{
factorial = factorial.multiply(new BigInteger(String.valueOf(i)));
}
System.out.println(factorial);
}
}
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