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Creating Augmented Reality Apps with Unity and AR Foundation

The Foreach Loop

Understand how to use the foreach loop in C# within Unity to iterate efficiently over arrays, lists, and dictionaries. This lesson helps you write cleaner, more readable code for AR projects by processing collections without needing indices, while also covering best practices to avoid common pitfalls.

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Introduction

Developers use the foreach loop in C# and Unity to iterate through the elements of an array or any other collection of items. It allows us to act on each item in the collection without knowing the size of the collection or the index of the current object.

Let’s look at examples of using the foreach loops in Unity using C#.

Iterating through an array

We can use a foreach loop to iterate through the elements of an array. Take a look at the example given below:

C#
int[] numbers = {1, 2, 3, 4, 5};
foreach (int number in numbers)
{
    Debug.Log(number);
}

In this example, the foreach loop iterates over each item in the numbers array and logs it to the console using Debug.Log(). ...