SORT ARRAYS

method lets you sort elements array. You can use the

not only with single-

also with jagged arrays because more than one single-dimensional

the IComparable or IComparer in the array implements. The

interfaces are defaults that C# with the Array.Sort method, so

about programming the interface

When you sort an array, C# orders the elements in that array in alphabetical order for strings and in numerical order for numerical types. You can then tie in the sort to a Console.WriteLine statement as shown in the task example so you can see how C# will sort the arrays.

For example, if you have a set of strings as your elements, and you want to write your sorted elements to the screen, the output will show the string with the first letter closest to the letter a and continue on in the list. If you have a numeric list, then the first number in the output will be the one that has the lowest amount, even if that amount is a negative number.

Properties

› Type a name for the file.

ˇ Click OK.

When you sort arrays that have strings that contain capital letters, C# considers those strings to be lower on the alphabetization list than strings with lowercase letters.

TYPE THIS:

using System; class SortArray;

{

public static void Main()

{

string[] names = {"too", "two", "To", "Too"}; Array.Sort(names);

foreach (string value in names)

{

Console.WriteLine("The word is {0}", value);

}

}

}

USING ARRAYS 7

RESULT:

The word is too

The word is two

The word is To

The word is Too

Á Type the code that creates an instance of your array, the elements in your array, the sort method, and outputs the results.

‡ Type the Output method that outputs the information to the screen.

C# lets you search for the first instance of an element in an array in case you need to pass a particular element in your array to another part of your

program or if you need to get some specific information such as finding the number of times an element appears in an array.

You can search within an array using the Array.IndexOf method. This built-in method returns the index number of the first array element that you want to search for. For example, if you search for the third element in an array, then the Array.IndexOf method returns the index

number 2 because the default first index number in an array is 0. If you set the first index number yourself, then the index number returned for your found element will vary.

The Array.IndexOf method also lets you search for an array element within certain index positions. For example, you can search for an array element that is the string and that appears between index number 2 and 10. You can also search for an array element from an index position through the last element in the array.

The drawback to using the Array.IndexOf method is that you can only search within a single-dimensional array.

Properties

› Type a name for the file.

ˇ Click OK.

Á Type the code that creates an instance of your array, the elements in your array, the

Array.IndexOf search method, and outputs the results.

‡ Type the Output method that outputs the information to the screen.