How to copy files from one document library to another library using powershell

In this blog we will be seeing how to copy files from one document library to another library using powershell

$siteURL="http://serverName:1111/"
$site=Get-SPSite $siteURL
$web=$site.RootWeb
$collFiles=$web.GetFolder("Shared Documents").Files
foreach($file in $collFiles)
{
 $file.CopyTo("Destination Library/"+$file.Name,$true)
}