Powershell script with params *and* functions - powershell

Question

I want to write a powershell script that takes in params and uses functions.
I tried this:
param
(
$arg
)
Func $arg;
function Func($arg)
{
Write-Output $arg;
}
but I got this:
The term 'Func' is not recognized as the name
of a cmdlet, function, script file, or operable program.
Check the spelling of the name, or if a path was included,
verify that the path is correct and try again.
At func.ps1:6 char:5
+ Func <<<< $arg;
+ CategoryInfo : ObjectNotFound: (Func:String) [], CommandNotFoundException
+ FullyQualifiedErrorId : CommandNotFoundException
Fine, I thought. I'll try this instead:
function Func($arg)
{
Write-Output $arg;
}
param
(
$arg
)
Func $arg;
But then, I got this:
The term 'param' is not recognized as the name
of a cmdlet, function, script file, or operable program.
Check the spelling of the name, or if a path was included,
verify that the path is correct and try again.
At C:\Users\akina\Documents\Work\ADDC\func.ps1:7 char:10
+ param <<<<
+ CategoryInfo : ObjectNotFound: (param:String) [], CommandNotFoundException
+ FullyQualifiedErrorId : CommandNotFoundException
Is what I'm asking for doable? Or am I being unreasonable in my request?

Answer 1

The param block in a script has to be the first non-comment code. After that, you need to define the function before you invoke it e.g.:
param
(
$arg
)
function Func($arg)
{
$arg
}
Func $arg
The Write-Output is unnecessary in your example since the default behavior is to output objects to the output stream.

Answer 2

All you need ius to make sure PARAM is first string of your script.

Answer 3

You can put the param tag inside the function..
Something like this:
function func($avg)
{
param
(
$avg
)
}