create a log file using powershell

How can I create a log file using powershell?

I am using this code for log file creation.

#  Log file time stamp:
$LogTime = Get-Date -Format "MM-dd-yyyy_hh-mm-ss"
#  Log file name:
$LogFile = 'C:\PSLogs\'+"LOG_"+$LogTime+".log"

if(---)
{
    ----
    ----
   "done" | Out-File $LogFile -Append -Force
}
else
{
  "Unlucky!!" | Out-File $LogFile -Append -Force
}

But it's showing me an error like

Out-File : Could not find a part of the path

Solution 1:

#  Log file time stamp:
$LogTime = Get-Date -Format "MM-dd-yyyy_hh-mm-ss"
[xml] $var = Get-Content D:\ScriptMgr\Sample.xml
$ser = read-host "Enter the centre:"

#  Log file name:
$path = "C:\Logs\"

if([IO.Directory]::Exists($path))
{
    #Do Nothing!!
}
else
{
    New-Item -ItemType directory -Path C:\PSLogs
}

$LogFile = 'C:\PSLogs\'+$ser+$LogTime+".html"
if (($sea=$var.detail.centre | where {$_.name -eq $ser}) -ne $null)
{
    Write-Host "center:" $sea.name
    Write-Host "Servername:" $sea.servername
    Write-Host "ip:" $sea.ip
    Write-Host "Username:" $sea.uname
    Write-Host "Password:" $sea.pwd
    Write-Host "Database:" $sea.dbname
    "$LogTime Found" | Out-File $LogFile -Append -Force
}
else
{
    write-host "not listed!!!"
    "$LogTime Not Found" | Out-File $LogFile -Append -Force
}