Passing arrays as arguments in C#

An array is a collection of similar type variables which are referred to by a common name. In C#, arrays are the reference types so it can be passed as arguments to the method. A method can modify the value of the elements of the array. Both single dimensional and multidimensional arrays can be passed as an argument to the methods.

Passing 1-D Arrays as arguments to methods

One can pass the 1-D arrays to a method. There are various options like first, you declare and initialize the array separately then pass it the to the method. Second, you can declare, initialize and pass the array to the method in a single line of code.

Example 1: Declaring and initializing array first and then pass it to the method as an argument.

// taking an integer array 
// declaring and intializing 
// the array 
int[] arr = {1, 2, 3, 4}; 
  
// passing the array as an  
// argument to the method 
// Result is the method name 
Result(arr); 

Example 2: Declaring, initializing and passing the array to the method in a single line of code.

Result(new int[] {1, 2, 3, 4});

Code: In the below program, we are passing the 1-D array arr to the method Result. The method is static and it will print the array elements which are passed to it.

// C# program for passing the 1-D  
// array to method as argument 
using System; 
  
class GFG { 
      
    // declaring a method  
    static void Result(int[] arr) { 
          
        // displaying the array elements 
        for(int i = 0; i < arr.Length; i++) 
        { 
            Console.WriteLine("Array Element: "+arr[i]); 
        } 
          
    }  
      
    // Main method 
    public static void Main() { 
          
        // declaring an array  
        // and intializing it 
        int[] arr = {1, 2, 3, 4, 5}; 
          
        // callling the method 
        Result(arr); 
    } 
} 

Output:

Array Element: 1
Array Element: 2
Array Element: 3
Array Element: 4
Array Element: 5

Passing Multi-Dimensional Arrays as arguments to Methods

You can also pass the multidimensional arrays to a method. There are various options like first, you declare and initialize the multi-dimensional array separately then pass it the to the method. Second, you can declare, initialize and pass the array to the method in a single line of code.

Example 1: Declaring and initializing array first and then pass it to the method as an argument.

// declaring and intializing 
// the 2-D array 
int[,] arr = { {1, 2, 3, 4}, {5, 6, 7, 8} }; 
  
// passing the array as an  
// argument to the method 
// Result is the method name 
Result(arr); 

Example 2: Declaring, initializing and passing the 2-D array to the method in a single line of code.

Result(new int[,] { {1, 2, 3, 4}, {5, 6, 7, 8} });

Code: In the below program, we are passing an 2-D array arr to the method transpose which gave the transpose of the matrix. GetLength() method is used for the count the total number of elements in a particular dimension.

// C# program for finding the transpose  
// of matrix(2-D array) by using array 
// as function arguments 
using System;  
  
class GFG {  
      
    // temp is used as temporary variable 
    static int temp = 0;  
  
  
    // passing 2-D array 'arr' as argument  
    // to find the transpose of matrix 
    static void transpose(int[, ] arr)  
    {  
        for (int i = 0; i < arr.GetLength(0); i++) {  
            for (int j = i; j < arr.GetLength(1); j++) {  
                temp = arr[i, j];  
                arr[i, j] = arr[j, i];  
                arr[j, i] = temp;  
            }  
        }  
    }  
  
    // to display the transposed matrix 
    static void displayresult(int[, ] arr)  
    {  
          
        Console.WriteLine("Matrix After Transpose: "); 
          
        for (int i = 0; i < arr.GetLength(0); i++) {  
            for (int j = 0; j < arr.GetLength(1); j++)  
                Console.Write(arr[i, j] + " ");  
            Console.WriteLine();  
        }  
    }  
      
    // Main Method 
    static public void Main()  
    {  
        // declaration of an 2-d array 
        int[, ] arr; 
          
        // initialzing 2-D array 
        // matrix of 4 rows and 4 colums 
        arr = new int[4, 4]{ { 1, 2, 3, 4},  
                             { 5, 6, 7, 8},  
                             {9, 10, 11, 12},  
                             {13, 14, 15, 16} }; 
                               
        Console.WriteLine("Matrix Before Transpose: "); 
          
        for (int i = 0; i < arr.GetLength(0); i++)  
        {  
            for (int j = 0; j < arr.GetLength(1); j++)  
                Console.Write(arr[i, j] + " ");  
            Console.WriteLine();  
        } 
          
        Console.WriteLine();  
          
        // calling transpose method 
        transpose(arr); 
          
        // calling displayresult method  
        // to display the result 
        displayresult(arr);  
    }  
}  

Output:

Matrix Before Transpose: 
1 2 3 4 
5 6 7 8 
9 10 11 12 
13 14 15 16 

Matrix After Transpose: 
1 5 9 13 
2 6 10 14 
3 7 11 15 
4 8 12 16

Passing arrays as arguments in C#

Passing 1-D Arrays as arguments to methods

Passing Multi-Dimensional Arrays as arguments to Methods

tags:

leave a comment

0 Comments

Subscribe to Our Newsletter

Top Followed books