C#: Separate odd and even integers in separate arrays

Last update on August 22 2025 12:42:18 (UTC/GMT +8 hours)

Write a program in C# Sharp to separate odd and even integers into separate arrays.

Sample Solution:-

Calculating a Even Numbers:

Even Numbers between 1 to 100:

Calculating a Odd Numbers:

Odd Numbers between 1 to 100:

C# Sharp Code:

using System;

public class Exercise10 
{  
    public static void Main() 
    {
        // Declare arrays to hold integers
	    int[] arr1 = new int[10];  // First array to store user input
	    int[] arr2 = new int[10];  // Array to store even integers
	    int[] arr3 = new int[10];  // Array to store odd integers
        int i, j = 0, k = 0, n;    // Declare variables for counting and user input

        // Display a message prompting user to enter the number of elements to be stored in the array
        Console.Write("\n\nSeparate odd and even integers in separate arrays:\n");
        Console.Write("------------------------------------------------------\n");	

        Console.Write("Input the number of elements to be stored in the array :");
        n = Convert.ToInt32(Console.ReadLine()); // Read the number of elements entered by the user

        // Prompt the user to input 'n' elements in the array
        Console.Write("Input {0} elements in the array :\n", n);
        for (i = 0; i < n; i++)
        {
            Console.Write("element - {0} : ", i);
            arr1[i] = Convert.ToInt32(Console.ReadLine()); // Store user input in the first array
        }

        // Iterate through the first array to separate even and odd numbers into separate arrays
        for (i = 0; i < n; i++)
        {
            if (arr1[i] % 2 == 0) // Check if the number is even
            {
                arr2[j] = arr1[i]; // Store even number in the second array
                j++; // Increment the counter for the even array
            }
            else
            {
                arr3[k] = arr1[i]; // Store odd number in the third array
                k++; // Increment the counter for the odd array
            }
        }

        // Display even elements stored in the second array
        Console.Write("\nThe Even elements are : \n");
        for (i = 0; i < j; i++)
        {
            Console.Write("{0} ", arr2[i]); // Print even numbers
        }

        // Display odd elements stored in the third array
        Console.Write("\nThe Odd elements are :\n");
        for (i = 0; i < k; i++)
        {
            Console.Write("{0} ", arr3[i]); // Print odd numbers
        }
        Console.Write("\n\n"); // Print a new line for formatting
    }	
}

Sample Output:

                                                                                                       
Separate odd and even integers in separate arrays:                                                            
------------------------------------------------------                                                        
Input the number of elements to be stored in the array :2                                                     
Input 2 elements in the array :                                                                               
element - 0 : 3                                                                                               
element - 1 : 6                                                                                                
The Even elements are :                                                                                       
6                                                                                                       
The Odd elements are :                                                                                        
3

Flowchart:

Go to:

PREV : Write a program in C# Sharp to find maximum and minimum element in an array.
NEXT : Write a program in C# Sharp to sort elements of array in ascending order.

C# Sharp Code Editor:

Contribute your code and comments through Disqus.