What is Array | Code Example

Array:

A container object that holds a fixed number of values that have a single datatype. You can store multiple variables of the same type in an array data structure. You declare an array by specifying the type of its elements.

Array Overview

An array has the following properties:

  • An array can be Single-Dimensional, Multidimensional or Jagged.
  • The number of dimensions and the length of each dimension are established when the array instance is created. These values can’t be changed during the lifetime of the instance.
  • The default values of numeric array elements are set to zero, and reference elements are set to null.
  • A jagged array is an array of arrays, and therefore its elements are reference types and are initialized to null.
  • Arrays are zero indexed: an array with n elements is indexed from 0 to n-1.
  • Array elements can be of any type, including an array type.
  • Array types are reference types derived from the abstract base type Array. Since this type implements IEnumerable and IEnumerable, you can use foreach iteration on all arrays in C#.

Code Example

class LINQQueryExpressions
{
    static void Main()
    {
        
        // Specify the data source.
        int[] scores = new int[] { 97, 92, 81, 60 };

        // Define the query expression.
        IEnumerable scoreQuery =
            from score in scores
            where score > 80
            select score;

        // Execute the query.
        foreach (int i in scoreQuery)
        {
            Console.Write(i + " ");
        }            
    }
}
// Output: 97 92 81

 

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