#### Array Dimensions in Goang

In Go, arrays can have multiple dimensions, which means they can be organized as matrices or tables with rows and columns. A two-dimensional array is an array of arrays, where each element of the outer array holds an inner array representing a row of the matrix.

Here’s an explanation of array dimensions using a two-dimensional array as an example:

1. Defining a Two-Dimensional Array: To define a two-dimensional array, you use the syntax `[rows][columns]elementType`.

``````// Defining a 2D array
var matrix int``````

This example defines a 2×2 integer matrix.

2. Initializing a Two-Dimensional Array: You can initialize a two-dimensional array during declaration by providing the values for each element.

``````// Initializing a 2D array
matrix := int{
{1, 2, 3},
{4, 5, 6},
{7, 8, 9},
}``````

This initializes a 3×3 matrix with the given values.

3. Accessing Elements: To access elements in a two-dimensional array, use two indices: one for the row and one for the column.

``````// Accessing elements
value := matrix // Gets the value in the second row and third column``````

4. Iterating Over a Two-Dimensional Array: You can use nested loops to iterate through the rows and columns of a two-dimensional array.

``````// Iterating over a 2D array
for row := 0; row < len(matrix); row++ {
for col := 0; col < len(matrix[row]); col++ {
fmt.Printf("Element at (%d, %d): %d\n", row, col, matrix[row][col])
}
}``````

This code prints each element along with its row and column indices.

5. Three-Dimensional Arrays: You can extend the concept of two-dimensional arrays to three or more dimensions, creating multi-dimensional arrays or tensors.

``````// Defining a 3D array
var cube int``````

Multi-dimensional arrays can be useful when working with data that has complex structures, such as image data or scientific simulations.

Keep in mind that multi-dimensional arrays can become less practical for larger dimensions due to the need to manage indices and memory complexity. For more dynamic structures, slices or maps might be more suitable in certain cases.

Here’s an example of using a two-dimensional array in Go to represent a matrix and performing operations on it:

``````package main

import "fmt"

func main() {
// Defining and initializing a 2D array
matrix := int{
{1, 2, 3},
{4, 5, 6},
{7, 8, 9},
}

// Accessing and printing elements
fmt.Println("Matrix:")
for row := 0; row < len(matrix); row++ {
for col := 0; col < len(matrix[row]); col++ {
fmt.Printf("%d ", matrix[row][col])
}
fmt.Println()
}

// Calculating the sum of all elements
sum := 0
for row := 0; row < len(matrix); row++ {
for col := 0; col < len(matrix[row]); col++ {
sum += matrix[row][col]
}
}
fmt.Println("Sum of all elements:", sum)
}``````

Output :

``````Matrix:
1 2 3
4 5 6
7 8 9
Sum of all elements: 45``````

In this example, we define a 3×3 matrix as a two-dimensional array. We then use nested loops to access and print each element of the matrix. Additionally, we calculate the sum of all elements in the matrix.

Two-dimensional arrays are useful for representing grid-like data structures, such as matrices, tables, or game boards. They allow you to store and manipulate data in a structured manner with rows and columns.

### Copy to another array

Copying elements from one array to another in Go can be achieved using a loop. Here’s an example of how you can copy elements from one array to another:

``````package main

import "fmt"

func main() {
// Source array
source := int{10, 20, 30, 40, 50}

// Destination array
var destination int

// Copying elements from source to destination
for i := 0; i < len(source); i++ {
destination[i] = source[i]
}

// Printing the destination array
fmt.Println("Destination array:", destination)
}``````

Output :

``Destination array: [10 20 30 40 50]``

In this example, we create a source array with some values. Then, we declare an empty destination array of the same size. Using a loop, we copy each element from the source array to the corresponding position in the destination array.

Keep in mind that if you’re working with slices, you can use the built-in `copy()` function to copy elements between slices. However, when dealing with arrays, as shown in this example, manual copying using a loop is the common approach.