Sort Array In C# Without Using Inbuilt Function

In this blog, we will learn to sort an array in C# without using an inbuilt C# function. We will learn ascending order and descending order array with a simple example.

Example 1 - Sort an array in ascending order without using inbuilt C# function

We will create a simple one integer array having values 2,9,4,3,5,1,7 in the array as described in the following example. We will take two for loops; first, a for loop for checking the first position of an array and iterating the length of the array. The second loop starts with the i+1 position and iterates the length of the array.

using System;
namespace SortArrayExample
{
class Program
{
static void Main(string[] args)
{
int[] intArray = new int[] {2,9,4,3,5,1,7 };
int temp = 0;
for (int i = 0; i <= intArray.Length-1; i++)
{
for (int j = i+1; j < intArray.Length; j++)
{
if (intArray[i] > intArray[j])
{
temp = intArray[i];
intArray[i] = intArray[j];
intArray[j] = temp;
}
}
}
Console.WriteLine("Array sort in asscending order");
foreach (var item in intArray)
{
Console.WriteLine(item);
}
Console.ReadLine();
}
}
}

Output

Example 2

Sort an array in descending order without using inbuilt C# function.

using System;
namespace SortArrayExample
{
class Program
{
static void Main(string[] args)
{
int[] intArray = new int[] {2,9,4,3,5,1,7 };
int temp = 0;
for (int i = 0; i <= intArray.Length-1; i++)
{
for (int j = i+1; j < intArray.Length; j++)
{
if (intArray[i] < intArray[j])
{
temp = intArray[i];
intArray[i] = intArray[j];
intArray[j] = temp;
}
}
}
Console.WriteLine("Array sort in descending order");
foreach (var item in intArray)
{
Console.WriteLine(item);
}
Console.ReadLine();
}
}
}

Output

I hope you understand how to sort an array without using the inbuilt function.