How to set and get the environment variables with nodejs

Using nodejs as alternative to bash scripting, It may be useful to know the environment variable management.

Get an environment variable:

 var value_variable = process.env.<variable_name>

Example:

 var java_home = process.env.JAVA_HOME;
 console.log("JAVA HOME: " + java_home);

Output:

 JAVA HOME: /opt/jdk1.6

Set an environment variable:

 process.env['VAR'] = "value";

Example:

 process.env['JAVA_HOME'] = "/opt/jdk1.8";
 var java_home = process.env.JAVA_HOME;
 console.log("JAVA HOME: " + java_home);

Output

 JAVA HOME: /opt/jdk1.8