Windows Batch %PATH% Environment Variable Shortener and Checker

PathShortener.cmd

REM In a command shell save output to a text file
REM e.g. C:\Users\myname\Desktop\ PathShortener.cmd > output.txt
REM Review output, then replace current %PATH% variable
REM This handy script was found online, unfortunately the original 
REM author isn't credited here.

@echo off

SET MyPath=%PATH%
echo %MyPath%
echo --

setlocal EnableDelayedExpansion

SET TempPath="%MyPath:;=";"%"
SET var=
FOR %%a IN (%TempPath%) DO (
    IF exist %%~sa (
        SET "var=!var!;%%~sa
    ) ELSE (
        echo %%a does not exist
    )
)

echo --
echo !var:~1!