Reverse an Integer Value in C# (Used No Built in Functions)

Today i have attened an IT Services Company interview, where i was been asked to write the code for Reverse an Integer Value in C# with out using any Built In functions.

Here is the code i formulated in my mind. Go through it.

[code lang=”c-sharp”]

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApp02
{
class Program
{
static void Main(string[] args)
{

Console.Write("Enter the Integer to Reverse: ");

//Reading the Entered Number
string strInVal = Console.ReadLine();

int inVal = Convert.ToInt32(strInVal);

//Calling Reverse Function
int outVal = Reverse(inVal);

Console.WriteLine(String.Format("Revered Interger value is {0}", outVal));

Console.WriteLine("**** Press Any Key to Exit ");

Console.Read();

}

public static int Reverse(int inVal)
{
int result = 0;

//Ex: 567
// Loop 1:
// 567 % 10 = 7
// (0 * 10) + 7 = 7
// inVal = 567 /10 = 56
// Loop 2:
// 56 % 10 = 6
// (7 * 10) + 6 = 76
// 56 / 10 = 5
// Loop 3:
// 5 % 10 = 5
// (56 * 10) + 5 = 765 — Achieved out result.
// 5 / 10 = 0 // Do while condition ends
do
{

result = (result * 10) + (inVal % 10);

inVal = inVal / 10;
}
while (inVal > 0);

return result;

}
}
}

[/code]

Results

Kudos!!! I hope it will defenitly be useful to some body. Unfortunately i was n’t been able to write it out in my paper in interview time, just after returning the paper only i got this idea, but no use, i thought asking paper back and write n give. Anyway’s some day it will be useful for some one.. KOOOOLLL