why is the error " use of unassigned local variable" ?

Question

I m a beginner , and in this program i am trying a simple sort . I dont know why i cant print  'sw'  in the FOR Loop ? 

I want an output : 
92
95
97
98
99






Here is my code, please help : 

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

namespace ConsoleApplication2

{

class Program

{

static void Main(string[] args)

{

int[] Arr = new int[5] { 99, 98, 92, 97, 95 };

//int[] Arr = { 90, 67, 87, 2, 5 };

int a, b,i;

int kw;

for (i = 0; i < 5; i++)

{

if (Arr[i] > Arr[i + 1])

{

int sw;

sw = Arr[i + 1];

Arr[i + 1] = Arr[i];

Arr[i] = sw;

Console.WriteLine(sw);

}

Console.WriteLine(sw);

// Console.WriteLine(" Sorted Array is : ", sw);

}

Console.ReadLine();

}

}

}