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Merge two arrays into third array using C# program

Given two arrays, we have to add them into the third array.
[Last updated : March 19, 2023]

C# - Merge Two Arrays

Given two integer arrays and we have to merge them and store in third array.

Example

For example we have two arrays:

Input:
ARR1: 10 20 30 40 50
ARR2: 60 70 80 90 100

Output:
Now we merge above arrays into 
another temporary array ARR3:
ARR3: 10 20 30 40 50 60 70 80 90 100

C# program to merge two arrays

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

namespace ConsoleApplication1 {
  class Program {
    static void Main() {
      int i = 0;
      int j = 0;

      int[] arr1 = new int[5];
      int[] arr2 = new int[5];
      int[] arr3 = new int[10];

      //Read numbers into array
      Console.WriteLine("Enter elements of ARR1 : ");
      for (i = 0; i < 5; i++) {
        Console.Write("Element[" + (i + 1) + "]: ");
        arr1[i] = int.Parse(Console.ReadLine());
      }

      //Read numbers into array
      Console.WriteLine("Enter elements of ARR2 : ");
      for (i = 0; i < 5; i++) {
        Console.Write("Element[" + (i + 1) + "]: ");
        arr2[i] = int.Parse(Console.ReadLine());
      }

      //Merge arr1 and arr2 to arr3
      for (i = 0, j = 0; i < 5; i++) {
        arr3[j++] = arr1[i];
      }
      for (i = 0; i < 5; i++) {
        arr3[j++] = arr2[i];
      }

      //Print merged array
      Console.WriteLine("Elements of ARR3 : ");
      for (i = 0; i < 10; i++) {
        Console.WriteLine("Element[" + (i + 1) + "]: " + arr3[i]);

      }

      Console.WriteLine();
    }
  }
}

Output

Enter elements of ARR1 :
Element[1]: 10
Element[2]: 20
Element[3]: 30
Element[4]: 40
Element[5]: 50
Enter elements of ARR2 :
Element[1]: 60
Element[2]: 70
Element[3]: 80
Element[4]: 90
Element[5]: 100
Elements of ARR3 :
Element[1]: 10
Element[2]: 20
Element[3]: 30
Element[4]: 40
Element[5]: 50
Element[6]: 60
Element[7]: 70
Element[8]: 80
Element[9]: 90
Element[10]: 100

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