A C# Jagged Arrays is an array of arrays. You can declare a jagged array named scores of type int as −
int [][] scores;
Declaring an array does not create an array in memory. To create the above array −
int[][] scores = new int[5][];
for (int i = 0; i < scores.Length; i++) {
scores[i] = new int[4];
}
You can initialize a jagged array as −
int[][] scores = new int[2][]{new int[]{92,93,94},new int[]{85,66,87,88}};
Where, scores are an array of two arrays of integers – scores[0] is an array of 3 integers, and scores[1] is an array of 4 integers.
Example
The following example illustrates using a jagged array −
using System;
namespace ArrayApplication {
class MyArray {
static void Main(string[] args) {
/* a jagged array of 5 array of integers*/
int[][] a = new int[][]{new int[]{0,0},new int[]{1,2},
new int[]{2,4},new int[]{ 3, 6 }, new int[]{ 4, 8 } };
int i, j;
/* output each array element's value */
for (i = 0; i < 5; i++) {
for (j = 0; j < 2; j++) {
Console.WriteLine("a[{0}][{1}] = {2}", i, j, a[i][j]);
}
}
Console.ReadKey();
}
}
}
When the above code is compiled and executed, it produces the following result −
a[0][0]: 0 a[0][1]: 0 a[1][0]: 1 a[1][1]: 2 a[2][0]: 2 a[2][1]: 4 a[3][0]: 3 a[3][1]: 6 a[4][0]: 4 a[4][1]: 8
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