You may want to directly access the apps in Command Prompt without entering whole path,
Example : Assume you have installed python 3 in “C:\python3\” , to access it in command prompt window you will need to enter whole path “C:\python3\python.exe“. But, if you have set path in windows, you will need to enter only “python“. That’s all, nothing more nothing less.
Open windows control panel, then select system or you can press pause/break key holding windows key. Now, the system information window should have been opened.
Now, select Advanced system settings from left side of the window.