In this tutorial, we will learn how to pass an array to function in C#. Before that you need to have an idea on following topics in C#.
We use a function to reuse a block of code in a program. And we can pass an array to the function as a parameter. To pass an array, we need to provide an array name as an argument of a function. Example:
1 2 | //passing array function_name(array_name); |
C# Passing Array to Function
Let us see it in a demonstration for passing an array to a function in C#. We will pass an array and find the largest element in a function.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 | //C# program to fincd largest element in an array using System; namespace Arrays { public class ArrayToFunction { static void maxElement(int[] arr, int arr_size) { int max = arr[0]; for (int i = 1; i < arr_size; i++) { if (max < arr[i]) { max = arr[i]; } } Console.WriteLine("Largest element is: " + max); } public static void Main(string[] args) { int[] arr = { 77, 85, 98, 14, 50 }; //passing array to function maxElement(arr, 5); } } } |
Output:
1 | Largest element is: 98 |
Another Example: C# Program to find the sum of all the elements present in an array.
In the program below, we will return the sum value from the user-defined function to the main function.
And you can see that, unlike the above example where we declared the function static, here function is non-static which means we need an object reference of the class to access a non-static function. Object obj is created as an instance of ArrayToFunc class.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 | using System; namespace Arrays { class ArrayToFunc { int getSum(int[] arr, int size) { int i; int sum = 0; for (i = 0; i < size; ++i) { sum += arr[i]; } return sum; } static void Main(string[] args) { ArrayToFunc obj = new ArrayToFunc(); //ceating and initializing array int[] arr = new int[] { 10, 20, 30, 40, 50 }; int result; //Passing array to a function and //storing the returned value in a result variable result = obj.getSum(arr, 5); //Display Console.WriteLine("Sum of all the elements: {0} ", result); } } } |
Output:
1 | Sum of all the elements: 150 |