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Array of Values

Explore how to declare and use arrays in C# for storing collections of values. Understand accessing elements by index, working with character arrays, and converting strings. Practice coding exercises that include summing array elements, palindrome testing, reversing arrays, and more to build foundational array manipulation skills.

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What is an array?

In C#, an array is a collection of the same type of values stored as a single variable. It is generally a comma-separated list of values enclosed in curly brackets. An array can be stored as a single variable. For example, {10, 20, 30} is an array of integers. It can be stored as a variable, as shown in the code below:

The following program demonstrates how to create an array of integer values:

C#
class Test
{
    static void Main()
    {
        int[] arr = {10, 20, 30};
        System.Console.WriteLine("The array is defined of type " + arr);
    }
}

In the code above:

  • We declare a variable, arr, to assign {10, 20, 30}. These comma-separated values enclosed in curly brackets are called an initialization array.
  • We call the variable, arr, an array, as indicated by [], before the variable name. These brackets are used to explicitly mention that the variable is an array. Here, the size 3 is determined by the number of values in the initialization array.

Accessing individual values

The individual values in an array are accessed through an index. An index is an integer representing the position of an individual value in the array. We enclose the index in square brackets after the array variable name. The first value is at the index 0, and the index moves forward in the array by linear increments. If there are three values in the array, they are indexed at ...