Batch file with functions

functions.bat

@echo off
echo PROGRAM_NAME:%~nx0 Start
echo.
================================

SET debugMode=%1
call :myFunc1 %debugMode%
call :myFunc2 para1 "para2 hello"

================================
echo PROGRAM_NAME:%~nx0 End & pause>nul
EXIT /B

:: 👇 define the function under below
:myFunc1 <isDebug>
    :: So that you can know the %1 means: isDebug.
    if "%1" == "1" (
        echo debug mode
    )
    EXIT /B

:myFunc2 <para1> <para2>
    :: output: para1
    echo %1

    :: output: "para2 hello"
    echo %2
    EXIT /B