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Task/Call-a-function/Batch-File/call-a-function.bat

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+:: http://rosettacode.org/wiki/Call_a_function
+:: Demonstrate the different syntax and semantics provided for calling a function.
+
+@echo off
+
+echo Calling myFunction1
+call:myFunction1
+echo.
+
+echo Calling myFunction2 11 8
+call:myFunction2 11 8
+echo.
+
+echo Calling myFunction3 /fi and saving the output into %%filecount%%
+call:myFunction3 /fi
+echo.%filecount%
+echo.
+
+echo Calling myFunction4 1 2 3 4 5
+call:myFunction4 1 2 3 4 5
+echo.
+
+echo Calling myFunction5 "filename=test.file" "filepath=C:\Test Directory\"
+call:myFunction5 "filename=test.file" "filepath=C:\Test Directory\"
+echo.
+echo Calling myFunction5 "filepath=C:\Test Directory\" "filename=test.file"
+call:myFunction5 "filepath=C:\Test Directory\" "filename=test.file"
+echo.
+
+pause>nul
+exit
+
+:: Requires no arguments
+:myFunction1
+	echo myFunction1 has been called.
+	goto:eof
+
+:: Fixed number of arguments (%a% & %b%)
+:myFunction2
+	:: Returns %a% + %b%
+	setlocal
+	set /a c=%~1+%~2
+	endlocal & echo %c%
+	goto:eof
+
+:: Optional arguments
+:myFunction3
+	:: Returns the amount of folders + files in the current directory
+	:: /fi Returns only file count
+	:: /fo Returns only folder count
+	
+	setlocal
+	set count=0
+	
+	if "%~1"=="" set "command=dir /b"
+	if "%~1"=="/fi" set "command=dir /b /A-d"
+	if "%~1"=="/fo" set "command=dir /b /Ad"
+
+	for /f "usebackq" %%i in (`%command%`) do set /a count+=1
+	
+	endlocal & set filecount=%count%
+	goto:eof
+
+:: Variable number of arguments
+:myFunction4
+	:: Returns sum of arguments
+	setlocal
+	:myFunction4loop
+	set sum=0
+	for %%i in (%*) do set /a sum+=%%i
+	endlocal & echo %sum%
+	goto:eof
+
+:: Named Arguments (filepath=[path] & filename=[name])
+:myFunction5
+	:: Returns the complete path based off the 2 arguments
+	if "%~1"=="" then goto:eof
+	setlocal enabledelayedexpansion
+	set "param=%~1"
+	
+	for /l %%i in (1,1,2) do (
+		for /f "tokens=1,2 delims==" %%j in ("!param!") do set %%j=%%k
+		set "param=%~2"
+	)
+	endlocal & echo.%filepath%%filename%
+	goto:eof