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How to iterate through the elements of a collection using a foreach loop in C#?

Steilla Mitchel22003-Nov-2023

How to iterate through the elements of a collection using a foreach loop in C#?

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Updated on 05-Nov-2023
Steilla Mitchel

Steilla Mitchel

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Aryan Kumar

Aryan Kumar

05-Nov-2023

In C#, you can iterate through the elements of a collection, such as a list, array, or other enumerable data structure, using a foreach loop. Here's how to do it:

foreach (ElementType element in collection)
{
    // Code to process 'element'
}

Here's a step-by-step explanation:

foreach Loop: Start with the foreach keyword, followed by parentheses containing the loop variables and the collection to be iterated.

ElementType: Replace "ElementType" with the actual data type of the elements within the collection. This is the type of variable that will represent each element during iteration.

element: Choose a variable name (e.g., element) that will represent each element as you iterate through the collection. This variable is declared implicitly.

collection: Replace "collection" with the name of the collection you want to iterate through.

Here's an example of how to use a foreach loop to iterate through the elements of a list:

using System;
using System.Collections.Generic;

public class Program
{
    public static void Main()
    {
        List<int> numbers = new List<int> { 1, 2, 3, 4, 5 };

        foreach (int number in numbers)
        {
            Console.WriteLine(number);
        }
    }
}

In this example, a List<int> named numbers is created and populated with integers. The foreach loop iterates through the elements of the list, and the variable number represents each element in turn. The code inside the loop body prints each element to the console.

You can use a foreach loop to iterate through various types of collections, such as arrays, lists, dictionaries, sets, and custom data structures that implement the IEnumerable or IEnumerable<T> interface. The foreach loop simplifies the process of iterating through elements and is widely used for working with collections in C#.

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