I have powershell function error, the not execute - powershell

Question

I am a beginner in powershell script. I have a diskcap function to avoid retyping the text. but I get errors.
Function DiskCap­ {
return
(write-host "calcule de l'espace libre avant le nettoyage.")
($FreeSpace = (Get-WmiObject win32_logicaldisk | where { $_.DeviceID -eq $env:SystemDrive }).FreeSpace)
($yourdisk = Get-WmiObject Win32_volume)
ForEach ($Item in $YourDisk) {
"{0,-8} {1,2}" -f $Item.Name, (Format-DiskSize $Item.Capacity).phase
}
}
pause
#Write-Host $(diskcap)
[ERROR] diskcap : Le terme «diskcap» n'est pas reconnu comme nom d'applet de commande, [ERROR] fonction, fichier de script ou
programme exécutable. Vérifiez l'orthographe du nom, [ERROR] ou si un
chemin d'accès existe, vérifiez que le chemin d'accès est correct et
[ERROR] réessayez. [ERROR] Au caractère
C:\Users\SoutienInformatique\Downloads\Ninite\CLEAN.ps1:53 : 15
[ERROR] + Write-Host $(diskcap) [ERROR] + ~~~~~~~
[ERROR] + CategoryInfo : ObjectNotFound: (diskcap:String)
[], CommandNotFoundEx [ERROR] ception [ERROR] +
FullyQualifiedErrorId : CommandNotFoundException [ERROR]

Answer 1

The following code doesn't throw the "'diskcap' is not recognized as the name of a cmdlet" error.
You don't need to add the write-host $(diskcap) at the end to get the output of the function. You can just call it. The parenthesis is also not nessecary around each statement.
function DiskCap­ {
write-host "calcule de l'espace libre avant le nettoyage."
$FreeSpace = (Get-WmiObject win32_logicaldisk | Where-Object { $_.DeviceID -eq $env:SystemDrive }).FreeSpace
$yourDisk = Get-WmiObject Win32_volume
foreach ($Item in $yourDisk)
{
"{0,-8} {1,2}" -f $Item.Name, (Format-DiskSize $Item.Capacity).phase
}
}
Pause
DiskCap­