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C# Jagged Array

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What is jagged array in C# ?

  • A jagged array is an array whose elements are arrays.
  • The elements of a jagged array can be of different dimensions and sizes.
  • A jagged array is sometimes called an "array-of-arrays".
 Jagged Array
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Syntax:

DataType[][] VariableName;
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Syntax Explanation:

  • datatype:
    • Datatype is used to specify the type of elements in the array.
  • [] []:
    • In jagged arrays, the first square bracket can be used as its own one-dimensional array or as a multi-dimensional array.

C# Sample Code - C# Examples:

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

namespace wikitechy_Jagged_arrays
{
    class Program
    {
        static void Main(string[] args)
        {
            int[][] array = new int[][] { new int[] { 0, 0 }, new int[] { 1, 2 }, 
            new int[] { 2, 1 }, new int[] { 3, 1 }, new int[] { 4, 1 } };
            int m, n;
           for (m = 0; m < 4; m++)
            {
              for (n = 0; n < 2; n++)
                {
                    Console.WriteLine("array of [{0}][{1}] is: = {2}", m, n, array[m][n]);

                }
            }
           Console.ReadKey();
        } 
    }
}
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Code Explanation:

 Jagged Array
  1. We declare and initialize a numerical array. And we declare jagged array of 5 array of integers.
  2. Here int m, n ; is an integer variables.
  3. for (m = 0; m< 4; m++) specifies integer m = 0, which means the expression, (m < 4), is true. Therefore, the statement is executed, and m gets incremented by 1 and becomes less than 3.
  4. for (n = 0; n< 2; n++) specifies integer n = 0, which means the expression, (n < 2), is true. Therefore, the statement is executed, and n gets incremented by 1 and becomes less than 2.
  5. Here we print the value of "m, n, array[m][n]" using the "array of" statement.
  6. Obtains the next character or function key pressed by the user. The pressed key is displayed in the console window.

Sample C# examples - Output :

 Jagged Array
  1. Here in this output the jagged array elements [0][0] is represented as a console statement. The array of elements [0][0] value as "0"
  2. Here in this output the jagged array elements [0][1] is represented as a console statement. The array of elements [0][1] value as "0"
  3. Here in this output the jagged array elements [1][0] is represented as a console statement. The array of elements [1][0] value as "1"
  4. Here in this output the jagged array elements [1][1] is represented as a console statement. The array of elements [1][1] value as "2"
  5. Here in this output the jagged array elements [2][0] is represented as a console statement. The array of elements [2][0] value as "2"
  6. Here in this output the jagged array elements [2][1] is represented as a console statement. The array of elements [2][1] value as "1"
  7. Here in this output the jagged array elements [3][0] is represented as a console statement. The array of elements [3][0] value as "3"
  8. Here in this output the jagged array elements [3][1] is represented as a console statement. The array of elements [3][1] value as "1"


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