C#

int[] someArray = new int[5]; // Array definition

for (int counter = 0; counter < 5; counter++) { // Loop
   someArray[counter] = counter;
}

YourType[] yourArray = new YourType[noitems]

YourType yourArrayVariable = yourArray[yourIndex];

YourType[,] yourTable = new YourType[6,2];

YourType[][] jaggedArray = new YourType[3][];
jaggedArray[0] = new YourType[3];    //<----- jaggedArray[0] is a single-dimensional array of type YourType
jaggedArray[0][2] //<----- This is a single variable of type YourType


Loops are a completely different thing.
A loop enables you to do something repeatedly while a condition is true.

While loops will do the instructions inside their body while a condition is true. The condition is evaluated before the loop starts and, if it is false, the loop does not start.
<pre lang="c#">
while (condition){
//do something if condition is true
}

do{
//do something
}while(condition);

for (declaration;condition;instruction){
//do something
}

for(int i = 0;i<5;i++){
}

string[] lines = new string[10];
for(int i = 0;i<10;i++){
Console.WriteLine(lines[i]);
}

string[] lines = new string[10];
int i;
for(i = 0;i<10;i++){
Console.WriteLine(lines[i]);
}

int[] integers = new int[20];
foreach(int i in integers){
Console.WriteLine(i);
}

public class Foo
{
    public event EventHandler<EventArgs> MyEvent;
    
    public void Test()
    {
        var handler = MyEvent;
        if (handler != null) handler(this, EventArgs.Empty);
    }
}

public class Bar
{
    private readonly Foo _foo;
    
    public Bar()
    {
        _foo = new Foo();
        _foo.MyEvent += MyEventHandler;
    }
    
    public void Test()
    {
        _foo.Test();
    }
    
    private void MyEventHandler(object sender, EventArgs e)
    {
        // Not static!
        Console.WriteLine("Bacon.");
    }
}

foreach (string reason in robotRegisterReasons)
                        sw.WriteLine(reason);