Serge van den Oever [Macaw]

I'm sure you're going to love this sample output:

PS C:\> function f([string]$a, [string]$b)

>> {

>>   Write-Host "a:", $a, " b:", $b

>> }

>>

PS C:\> f("A", "B")

a: A B  b:

PS C:\> f "A", "B"

a: A B  b:

PS C:\> f "A" "B"

a: A  b: B

PS C:\> f("A", "B") "C"

a: A B  b: C

PS C:\>

Your behavior isn't just from the parentheses, but due to the commas.

PowerShell is a bit funky.. When you create a function and you want to supply parameters, the following format applies:

function fname {

  param([string]$a, [int]$b) # the two parameters.

  write-host ("a = " + $a)

  write-host ("b = " + $b)

}

Thanks for the clarifation

man I fought with this for a day...

I want to pass args as in c++

foo(2,20)

but in Pshell it's

foo "2" "20"

provided  that foo is written to accept params:

funtion foo {

param([int]=$arg1,[int]=$arg2)

write-host "$arg1, $arg2"

}

SO, now I have it cleared up, but still, my c++ side wants to call this like foo(2,20).

Anyway, thanks again!

Great, just what I was looking for. Thanks.

yeah me too,i was going nuts over this !

Thx,

I was fighting with PShell passing arguments, had a tuff time for half a day.

i was going mad what is wrong with it.

Anyways thanks a lot :)

hello to all,

i don't understand all

pls i need en fonction

(or parameter) like:

function var {var1,var2,var3, ....

  if ([int64]var -lt 0)

   $var.style.color="#E30000";}

thnx for any help

AA

That sucked!  It took me 4 hours of my life to figure this out....and I cannot get them back :(

Thats because powershell; nice as it is; is also pointlessly and randomly obscurely different and bizarre just for the sake of it.

Its like the people who designed it had been locked away by Microsoft for forty years in a commune somewhere; isolated from the whole history of the computing universe; and then were told to create powershell untainted from anything that ever existed before.

I would be probably still wondering why the parameter type inside and outside the function is different

function fnc

 {

   param ( $str )

   $str = $str + "aaa"

   #write-host $str

   return $str

 }

cls

[string]$str = "bo"

fnc $str

write-host $str

+++++++++++++++++++++++++

I would expect $str to be "boaaa", but it still is "bo"

The variable $str needs to be a reference variable of type [ref] in order for it to be called by reference.  Also need to use the .value property and the return $str is unnecessary. Try this.

function fnc

{ param ( [ref]$str )

  $str.value = $str.value + "aaa"

  #return $str

}

cls

[string]$str = "bo"

fnc ([ref]$str)

write-host $str

Important missing point: You simply can't call the function before you had written down that into the script, for instance:

this does works:

function foo(){Write-Host "foo"}

foo()

this doesn't works:

foo()

function foo(){Write-Host "foo"}

Knowing this may save some time, don't you think?

How can you call a powershell function that has parameters that is in a different script??

Thanks for the help!

Thanks a lot for the comment on how to call a function. I'm a couple hours old in powershell and I'm quite surprised by the some of the syntax.

HaGD

Phil

Thanks a lot.This really help me from tearing half of my hair out.the other half I tore up already trying to pass the arguments in the function.

This helped - the C# mindeset kept thinking put parens and then args.

so now it is something like

function fname {

 param(

[string]parmOne=$(throw "parmOne required"),

[int]parm2

)## End of Parms and start of function

<statments of function>

} #end brace of function

I tried to pass 2 args with and without parens and it was not working.

fname -parmOne "Data" -parm2 256

I had to pass the parameters as NAMED variables. And then it worked.

Thanks - your post was the first in Google results.

How about some how-to on passing a boolean (i.e. Switch-type) param into a .ps1 script file?

Thanks!

I spent more than 2h trying to sort this out.

Kirill

Thanks a lot!

really strange behavior !!

@ajc (and others try passing boolean params):

the type should be "bool"

   Param(

             [string] $VM,

             [bool] $Suspend

         )

this works

Yes there should realize the reader to RSS my feed to RSS commentary, quite simply

Thanks for the concepts of parameter passing with functions.

man .. thanks so much