Question

I am defining a function to switch from Player “X” to player “O”. When I run this little block of code without the function, it gives me back an X. When I run this with a function defined it returns as O. What makes the difference between running it normally and running it from a Function ?

$playgame = "True"
$player = "O"

#Function
Switch-play
Write-host $player



#Switch Player turn
Function Switch-Play{
    if ($playgame = "True") {
        if ($player -eq "X") {$player = "O"}
        else {$player = "X"}
        }
}

Thanks

EDIT: At first I was in doubt about defining the variables as $script:player, but that didn’t really solve anything.

EDIT: changing to Switch-Play rather than Switch-play

PS C:\Users\scout> $playgame = "True"
$player = "O"
$player
Switch-Play
$player
Switch-Play 
$player




#Switch Player turn
Function Switch-Play{
    if ($playgame = "True") {
        if ($player -eq "X") {$player = "O"}
        else {$player = "X"}
        }
}
O
O
O

Answer 1

Variable Scope issue here. Change function like this:

Function Switch-Play{
    if ($playgame) {
        if ($global:player -eq "X") 
            {
              $global:player = "O"}
        else 
            {                
              $global:player = "X"
            }
        }
}

Reading about scope: http://technet.microsoft.com/en-us/library/hh847849.aspx