Windows Batch Script: comma in command arguments

Comma (or semicolon) in command arguments, if not quoted, are considered separators (same as white space). See the script (named test.bat) below:

@echo off
:loop
if not "%~1"=="" (
    echo %~1 
    shift
    goto :loop
)

When calling the script,
if not quoted:

test.bat 1,2,3

1
2
3

if quoted:

test.bat "1,2,3"

1,2,3