Node.js process and Environment

const args = process.argv.slice(2);
console.log("arguments:", args.length);

process.env.GREETING = "Hello";
console.log(process.env.GREETING, process.env.MISSING_VAR);
console.log(process.env.MISSING_VAR || "default value");

console.log(typeof process.pid, process.platform.length > 0);
console.log(typeof process.cwd());

process.on("exit", (code) => console.log("exiting with", code));
console.log("last line of the program");

arguments: 0
Hello undefined
default value
number true
string
last line of the program
exiting with 0