Arrays

[Hosea]

Hi I am learning programing, C# and I am on Arrays part. So I have this code and I don't understand. static void Main(string[] args) { int[] n = new int[10]; int i, j; //initialize elements of array n for (i = 0; i < 10; i++) { n = i + 100; } /* output each array element's value */ for (j = 0; j < 10; j++) { Console.WriteLine("Element [{0}] = {1}", j, n[j]); } Console.ReadKey(); } Firstly I would like to know, how can I return values of i for loop, without using j for loop.. and why j for loop was used to display output.

 

[jmcilhinney]

The first loop is used to put values into the array and the second is used to get the values out of the array and display them. In your terms, the j for loop IS returning the values of the i for loop. You could do away with j and use i as the counter for both loops if you wanted but the author of the code is simply trying to differentiate between the two operations: input and output.

Normally, when you want to get the data out of an array you won't have just put the data into it yourself using a loop like that. You'll have obtained the array from some other source. For instance, if you had a file Names.txt that contained this data:

Peter
Paul
Mary

then you might do this:

static void Main(string[] args)
{
    var names = File.ReadAllLines("Names.txt");

    for (var i = 0; i < names.Length; i++)
    {
        Console.WriteLine("Name [{0}] = {1}", i, names[i]);
    }

    Console.ReadLine();
}