Environment Variables by Language

Every language has its own way of accessing environment variables. Choose your language to learn the idiomatic approach, popular libraries, and common pitfalls.

Node.js

Access env vars with process.env in Node.js and Bun

Python

Using os.environ and python-dotenv

Go

Using os.Getenv and envconfig packages

Rust

Using std::env and dotenvy

Java

System.getenv() and Spring Boot properties

Ruby

ENV[] and dotenv gem

PHP

getenv() and $_ENV superglobal

C#

Environment.GetEnvironmentVariable and IConfiguration