View source for Array in C

[[Category:CSharp]]
== Declaring Arrays ==
To declare an array in C#, you can use the following syntax:
 datatype[] arrayName;

== Initializing an Array ==
Declaring an array does not initialize the array in the memory. When the array variable is initialized, you can assign values to the array.

Array is a reference type, so you need to use the new keyword to create an instance of the array.

 double[] balance = new double[10];

== Assigning Values to an Array ==
You can assign values to individual array elements, by using the index number, like:

 double[] balance = new double[10];
 balance[0] = 4500.0;

You can assign values to the array at the time of declaration, like:

 double[] balance = { 2340.0, 4523.69, 3421.0};

You can also create and initialize an array, like:

 int [] marks = new int[5]  { 99,  98, 92, 97, 95};

In the preceding case, you may also omit the size of the array, like:

 int [] marks = new int[]  { 99,  98, 92, 97, 95};

You can also copy an array variable into another target array variable. In that case, both the target and source would point to the same memory location:

 int [] marks = new int[]  { 99,  98, 92, 97, 95};
 int[] score = marks;

Using the foreach Loop
In the previous example, we have used a for loop for accessing each array element. You can also use a foreach statement to iterate through an array.

 using System;
 
 namespace ArrayApplication
 {
   class MyArray
   {
      static void Main(string[] args)
      {
         int []  n = new int[10]; /* n is an array of 10 integers */
 
 
         /* initialize elements of array n */         
         for ( int i = 0; i < 10; i++ )
         {
            n[i] = i + 100;
         }
 
         /* output each array element's value */
         foreach (int j in n )
         {
            int i = j-100;
            Console.WriteLine("Element[{0}] = {1}", i, j);
            i++;
         }
         Console.ReadKey();
      }
   }
 }