Question

How to get matrix size in c#

Answer 1

using System;

class Program
{
    static void Main()
    {
        int[,] matrix = {
            { 1, 2, 3, 10 },
            { 4, 5, 6, 20 },
            { 7, 8, 9, 39 }
        };

        // Get the number of rows (first dimension)
        int rows = matrix.GetLength(0);

        // Get the number of columns (second dimension)
        int columns = matrix.GetLength(1);

        Console.WriteLine($"Matrix size: {rows} rows x {columns} columns");

        // Alternative: Using GetUpperBound (0-based index)
        rows = matrix.GetUpperBound(0) + 1; // Add 1 
        columns = matrix.GetUpperBound(1) + 1;

        Console.WriteLine($"Matrix size (using GetUpperBound): {rows} rows x {columns} columns");
        
        Console.WriteLine("total cells: {0}", rows * columns);
    }
}


/*
run:

Matrix size: 3 rows x 4 columns
Matrix size (using GetUpperBound): 3 rows x 4 columns
total cells: 12

*/

 

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