C# Array Dimension, LowerBound, UpperBound, Length, Size on the fly

using System;
namespace ConsoleArray
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("Enter the array size");
            string arr_size = Console.ReadLine();
            int arrSize = Convert.ToInt32(arr_size);
            int[] myArr;
            myArr = new int[arrSize];
            Console.WriteLine("\nResult:");
            for (int i = 0; i < myArr.Length; i++)
            {
                Console.WriteLine(i);
            }

            Console.WriteLine("One-Dimensional Array has dimension=0");
            Console.WriteLine("LowerBound:{0}", myArr.GetLowerBound(0));
            Console.WriteLine("UpperBound:{0}", myArr.GetUpperBound(0));
            Console.WriteLine("Length:{0}", myArr.Length);
            Console.ReadKey();
        }
    }
}

OUTPUT

Enter the array size

8

Result:

0

1

2

3

4

5

6

7

One-Dimensional Array has dimension=0

LowerBound:0

UpperBound:7

Length:8

using System;
namespace ConsoleArray
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("Enter the array first dimension size");
            string arr_dim1 = Console.ReadLine();
            int arrDim1 = Convert.ToInt32(arr_dim1);
            Console.WriteLine("Enter the array second dimension size");
            string arr_dim2 = Console.ReadLine();
            int arrDim2 = Convert.ToInt32(arr_dim2);


            int[,] myArr;
            myArr = new int[arrDim1 , arrDim2];

            Console.WriteLine("\nResult:");
            for (int i = 0; i < myArr.GetUpperBound(0)+1; i++)
            {
                for (int j = 0; j < myArr.GetUpperBound(1)+1; j++)
                {
                    Console.WriteLine("({0},{1})={2}",i,j, i+j);
                }
            }

            Console.WriteLine("Two-Dimensional Array has dimensions =0, 1");
            Console.WriteLine("LowerBound, 1st Dim:{0}", myArr.GetLowerBound(0));
            Console.WriteLine("UpperBound, 1st Dim:{0}", myArr.GetUpperBound(0));
            Console.WriteLine("LowerBound, 2nd Dim:{0}", myArr.GetLowerBound(1));
            Console.WriteLine("UpperBound, 2nd Dim:{0}", myArr.GetUpperBound(1));
            Console.WriteLine("Length:{0}", myArr.Length);
            Console.ReadKey();
        }
    }
}

OUTPUT

Enter the array first dimension size

3

Enter the array second dimension size

4

Result:

(0,0)=0

(0,1)=1

(0,2)=2

(0,3)=3

(1,0)=1

(1,1)=2

(1,2)=3

(1,3)=4

(2,0)=2

(2,1)=3

(2,2)=4

(2,3)=5

Two-Dimensional Array has dimensions =0, 1

LowerBound, 1st Dim:0

UpperBound, 1st Dim:2

LowerBound, 2nd Dim:0

UpperBound, 2nd Dim:3

Length:12

NOTE: Dimension begins from 0, so we get UpperBound one less than the size of the dimension.

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Edited on 6th July 2023