How Can I Replicate PHP Array Addition in C#?

[adjacent]

The title.
A friend of me told me the code in php

<?php 
for($i=0; $i<=100; $i++) 
{ 
     if($i%5==0) 
     { 
          $out[] = $i; 
     } 
}  
foreach($out as $val) 
{ 
   echo $val."<br>"; 
} 
?>

The result is the multiples of 5 in the first 100.
How do I reproduce this part:"$out[] = $i; " in C#?
I have searched everywhere but couldn't find how to do that.

 

[DrZoidberg]

Use the List class.
http://msdn.microsoft.com/en-us/library/6sh2ey19(v=vs.110).aspx

List<int> out= new List<int>();
...
out.Add(i);

 

[adjacent]

Use the List class.
http://msdn.microsoft.com/en-us/library/6sh2ey19(v=vs.110).aspx

List<int> out= new List<int>();
...
out.Add(i);

Oh, thank you so much. This is my final code

while (true)
            {
                int limit;
                int multiple;
                Console.Write("Limit:");
                int.TryParse(Console.ReadLine(), out limit);
                Console.Write("Multiple:");
                int.TryParse(Console.ReadLine(), out multiple);
                List<int> no = new List<int>();
                for (int i = 1; i <= limit; i++)
                {
                    if (i % multiple == 0)
                    {
                        no.Add(i);
                    }
                }

                foreach (object o in no)
                {
                    Console.WriteLine(o);
                }
            }

 

[voko]

This code is inefficient. Out of many iterations of the loop, only a small number produce a useful result. Can you improve that, ideally so that every iteration results in a addition to the list?

Further, can you use an array, as you seem to have wanted initially, rather than a list?

Finally, if the goal is to output the numbers, do you really need to store them?

 

[LudusRex]

In C#, you can add values to an array using the .Add method. Here is an example of how to reproduce the code in the question using C#:

int[] out = new int[100]; //create an array with 100 elements
for (int i = 0; i < 100; i++)
{
if (i % 5 == 0)
{
out.Add(i); //using the .Add method to add values to the array
}
}
foreach (int val in out)
{
Console.WriteLine(val); //printing out the values in the array
}

The key difference in C# is that you need to specify the size of the array beforehand, whereas in PHP, arrays can dynamically grow as you add values to them.