if ((Get-PSSnapin "Microsoft.SharePoint.PowerShell" -ErrorAction SilentlyContinue) -eq $null) 
{
    Add-PSSnapin "Microsoft.SharePoint.PowerShell"
}

Write-Host "What log method would you like to run, correlation id or time range?"
$logFileOperation = Read-Host "[1] for correlation [2] for time range"
$logFileName = Read-Host "Save Log File As"
$LogFileTime = Get-Date -Format "MM-dd-yyyy_hh-mm-ss"
$LogFileFolder = "E:\YourLogPathHere\"
$logFilePath = $LogFileFolder+$logFileName+"_"+$LogFileTime + ".txt"

If ($logFileOperation -eq "1") {
	$correlationid = Read-Host "Paste Correlation ID"
	Merge-SPLogfile -Correlation $correlationid -path $logFilePath
		Write-Host "Merged File Saved here $logFilePath"
	} 
elseif ($logFileOperation -eq "2") 
	{
	$startTimeValue = Read-Host "Enter Start Log Time MM/DD/YYY HH:MM"
	$endTimeValue = Read-Host "Enter End Log Time MM/DD/YYY HH:MM"
	Merge-SPLogfile -startTime $startTimeValue -endTime $endTimeValue -path $logFilePath
		Write-Host "Merged File Saved here $logFilePath"
	}
else
	{
		Write-Host "No Operation value selected."
	}