Pay particular attention to the variable called PATH. Try issuing a " set" command on your system, and study the environment variables listed. To list ALL the environment variables and their values, start a CMD and issue the command " set", as follows, // Display all the variables (in NAME=VALUE pairs) set COMPUTERNAME=xxxxxxx Display Environment Variables and their Values They are typically named in uppercase, with words joined with underscore ( _), e.g., JAVA_HOME.
Environment variables are useful to store system-wide values, for examples, Environment variables are global system variables accessible by all the processes/users running under the Operating System (OS), such as Windows, macOS and Linux.