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# Last non zero of factorial.

By: a guest on Apr 9th, 2013  |  syntax: Java  |  size: 1.45 KB  |  views: 45  |  expires: Never
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1. import java.io.*;
2.
3. public class Challenge1 {
4.
5.
6.         public static int Factorial(int number)
7.         {
8.                 int temp;
9.                 if(number <= 1)
10.                 {
11.                         return 1;
12.                 }
13.                 temp = number* Factorial(number -1);
14.                 return temp;
15.         }
16.
17.         public static int FindLastNonZero(int number)
18.         {
19.                 int foundNumber = number;
20.                 int count = 0;
21.
22.                 //Convert number to an array of integers
23.
24.                 //First: find how long the array will be
25.                 while(foundNumber != 0)
26.                 {
27.                         foundNumber /= 10;
28.                         count++;
29.                 }
30.                 // create the new array based off of the found length
31.                 int numberArray[] = new int[count];
32.
33.                 count = 0;
34.                 foundNumber = number;
35.
36.                 //Create the array and put the last digit into the first position.
37.                 // i.e.  1024   array[0] = 4, array[1] = 2, array[2] =0, etc...
38.                 while (foundNumber != 0)
39.                 {
40.                         numberArray[count] = foundNumber % 10;
41.                         foundNumber /= 10;
42.                         count++;
43.                 }
44.
45.                 int position=0;
46.
47.                 // iterate through the array to find the last non-zero integer
48.                 while (numberArray[position] == 0)
49.                 {
50.                          position++;
51.                 }
52.
53.                 return numberArray[position];
54.         }
55.
56.         public static void main(String [] args) throws NumberFormatException, IOException
57.         {
58.                 int inputNum;