About
In this code snippet, we’ll find out how to loop through arrays in C#.
The following C# code snippet contains the code for looping through 1D, 2D, and 3D arrays, filling them up with random numbers and then writing out the values from the arrays.
Code:
using System;
namespace ArrayLooping
{
class Program
{
static void Main(string[] args)
{
//Make empty array.(Each "dimension" of a multidimnensional array can have a different size.)
int[] oneDimensionalArray = new int[10];
int[,] twoDimensionalArray = new int[10,5];
int[,,] threeDimensionalArray = new int[10,5,15];
//Fill the arrays with random numbers.
oneDimensionalArray = fill1DArray(oneDimensionalArray);
twoDimensionalArray = fill2DArray(twoDimensionalArray);
threeDimensionalArray = fill3DArray(threeDimensionalArray);
//Write out the contents of the arrays.
Console.WriteLine("1D Array");
print1DArray(oneDimensionalArray);
Console.WriteLine("");
Console.WriteLine("2D Array");
print2DArray(twoDimensionalArray);
Console.WriteLine("");
Console.WriteLine("3D Array:");
print3DArray(threeDimensionalArray);
Console.ReadLine();
}
public static void print1DArray(int[] array)
{
for (int i = 0; i < array.Length; i++)
{
Console.Write(array[i]+", ");
}
}
public static void print2DArray(int[,] array)
{
//Loop through array. (We use array.GetLength(0) with the index of the "dimension" to get the size.)
for (int i = 0; i < array.GetLength(0); i++)
{
for (int j = 0; j < array.GetLength(1); j++)
{
Console.Write(array[i,j] + ", ");
}
}
}
public static void print3DArray(int[,,] array)
{
//Loop through array. (We use array.GetLength(0) with the index of the "dimension" to get the size.)
for (int i = 0; i < array.GetLength(0); i++)
{
for (int j = 0; j < array.GetLength(1); j++)
{
for (int k = 0; k < array.GetLength(2); k++)
{
Console.Write(array[i,j,k] + ", ");
}
}
}
}
public static int[] fill1DArray(int[] array)
{
Random rnd = new Random();
//Loop through array.
for (int i = 0; i < array.Length; i++)
{
//Save a random number form 1-10 into array.
array[i] = rnd.Next(1, 10);
}
return array;
}
public static int[,] fill2DArray(int[,] array)
{
Random rnd = new Random();
//Loop through array. (We use array.GetLength(0) with the index of the "dimension" to get the size.)
for (int i = 0; i < array.GetLength(0); i++)
{
for (int j = 0; j < array.GetLength(1); j++)
{
//Save a random number form 1-10 into array.
array[i, j] = rnd.Next(1, 10);
}
}
return array;
}
public static int[,,] fill3DArray(int[,,] array)
{
Random rnd = new Random();
//Loop through array. (We use array.GetLength(0) with the index of the "dimension" to get the size.)
for (int i = 0; i < array.GetLength(0); i++)
{
for (int j = 0; j < array.GetLength(1); j++)
{
for (int k = 0; k < array.GetLength(2); k++)
{
//Save a random number form 1-10 into array.
array[i, j, k] = rnd.Next(1, 10);
}
}
}
return array;
}
}
} Resulting output:
