Question

I figured the array out, but now I want to Write-host the value of my $CreateGrid[1,1] for example to

Write-host "  A   B   C   D   E   F   G   H   I   J " 
Write-host "+---+---+---+---+---+---+---+---+---+---+ "
Write-host "|   |   |   |   |   |   |   |   |   |   | 1"
Write-host "+---+---+---+---+---+---+---+---+---+---+ "
Write-host "|   |   |   |   |   |   |   |   |   |   | 2"
Write-host "+---+---+---+---+---+---+---+---+---+---+ "
Write-host "|   |   |   |   |   |   |   |   |   |   | 3"
Write-host "+---+---+---+---+---+---+---+---+---+---+ "
Write-host "|   |   |   |   |   |   |   |   |   |   | 4"
Write-host "+---+---+---+---+---+---+---+---+---+---+ "
Write-host "|   |   |   |   |   |   |   |   |   |   | 5"
Write-host "+---+---+---+---+---+---+---+---+---+---+ "
Write-host "|   |   |   |   |   |   |   |   |   |   | 6"
Write-host "+---+---+---+---+---+---+---+---+---+---+ "
Write-host "|   |   |   |   |   |   |   |   |   |   | 7"
Write-host "+---+---+---+---+---+---+---+---+---+---+ "
Write-host "|   |   |   |   |   |   |   |   |   |   | 8"
Write-host "+---+---+---+---+---+---+---+---+---+---+ "
Write-host "|   |   |   |   |   |   |   |   |   |   | 9"
Write-host "+---+---+---+---+---+---+---+---+---+---+ "
Write-host "| $CreateGrid[1,1] |   |   |   |   |   |   |   |   |   | 10"
Write-host "+---+---+---+---+---+---+---+---+---+---+ " 

However when I try this, I get the following output for the value:

(          System.Object[] System.Object[] System.Object[] System.Object[] System.Object[] System.Object[] System.Object[] System.Object[]             Syst
em.Object[] System.Object[]                   System.Object[]                                                 [1,1])

How would I go around this? or is there a more clever way?
In short I want to include the positional value of the array in the Grid shown above.

EDIT:

$CreateBoard = New-object "Array[,]" 10,10

Function Add-ToColumn{
param ([Int] $columnnum,[String] $player)

    PROCESS{if (0..9 -notcontains $columnnum){"Invalid move";return}
        #0 is the bottom, 9 is the top
        for($i = 0; $i -le 9; $i++)
        {
            if ($CreateBoard[$columnnum, $i] -eq $null)
            {
                $CreateBoard[$columnnum, $i] = $player
                "Coin placed in $columnnum, $i coins in the column!"
                return
            }
        }
        #if you get here, column is full
        "Invalid move"
    }
}

Answer 1

When you put an expression in a double quoted string, the parser stops at the first non-variable name character. So:

"$CreateGrid[1,1]"

is processed as if it were

"$CreateGrid" + "[1,1]"

and as $CreateGrid is (or at least appears to be) an array it performs a ToString on each member and concatenates the results (as this is a two dimensional array, each enumerated member is an array, hence System.Object[] multiple times).

If you use the expression syntax ($(...)) inside the string the whole contained expression is processed as a PowerShell expression (eg. you can put a pipeline in there):

"$($CreateGrid[1,1])"