Multidimensional Array In C#.NET
When we want to store the information in the format of rows and columns then we
use the concept of multidimensional array. Best example of multidimensional
array is Microsoft Excel in which all the information is stored in the format of
rows and columns. Whenever you want to solve some mathematical problems like
matrix, 3-d, 4-d, n-d problems then we also use the concept of multidimensional
array. One thing more interesting all the monitors, TVs and LCD’s uses the
concept of multidimensional array.
Syntax for Declaring Multidimensional array
<data type> [,] <array name>=new <data type>[<rows>,<columns>];
Where
<data type> represents the data type such as int, float, string etc.
[,]represents dimensions. As much dimensions you wants you have to place so many
,(commos).
[<rows>,<columns>] represents how many rows and columns you need.
Examples for declaring multidimensional array
·
int [,] mat=new int[3,5]; //A multidimensional
array mat is declared which have two dimensions.
·
int [, ,] threeD=new int [3,2,4]; //A
multidimensional array threeD is declared which have three dimensions.
Inserting Values In Multidimensional Arrays
After declaring multidimensional arrays we have to insert values in
multidimensional arrays. In multidimensional arrays each cell is identified by
multiple indexes. If we created two dimensional arrays then each cell is
identified by two indexes and if we created three dimensions then each cell is
identified by three indexes.
Syntax for inserting values in
multidimensional array
<array
name>[<row index>,<column index>]=<value>;
Where <row index> represents row number and <column index> represents column
number.
Example for inserting values in multidimensional arrays
·
mat[0,2]=45; // 45 is stored in mat named array
at 0th rows of 2nd columns.
·
threeD[1,2,1]=66; // 66 is stored in threeD named
array.
Inserting/Traversing of array by using
for loops
Example 1: Inserting values in multidimensional
array.
public
void insertMultiDimensionalArray()
{
int[,] mat = new
int[3, 3];//A
multidimensional array of named mat is declared.
for (int
i = 0; i < mat.GetLength(0); i++)//outer loop which
iterates rows.GetLength(int Dimension) is method of array which gives the length
of dimensions which is passed.
{
for (int
j = 0; j < mat.GetLength(1); j++)//inner loop which
iterates columns.GetLength(int Dimension) is method of array which gives the
length of dimensions which is passed.
{
Console.Write("Enter Value In Array---> ");//A
message is declared.
mat[i, j] = Convert.ToInt32(Console.ReadLine());//Values
is stored in multidimensional array
}
}
}
Example 2: Traversing
values in multidimensional array.
public
void traverseMultiDimensionalArray(int[,] mat)
{
for (int
i = 0; i < mat.GetLength(0); i++)
{
for (int
j = 0; j < mat.GetLength(1); j++)
{
Console.WriteLine("The values are : " + mat[i, j]);
}
}
}
Note: When use concept of multidimensional
array then call GetLength(int Dimension) method of array which returns length of
the dimensions. Never use Length property of array.
|