Config -

Less elegant for deeply nested, highly complex data hierarchies compared to JSON or YAML. Environment Variables (.env)

And the config is seamlessly merged.

Different environments favor different "languages" for writing their config files: config

In modern software development, a single static configuration file is rarely enough. Systems are deployed across multiple environments (Local, Development, Staging, Production). To handle this, engineers use a . Less elegant for deeply nested, highly complex data

For programmers, configuration is about managing environments. An app needs different settings when it’s running on a developer’s laptop (Local), being tested (Staging), or being used by millions of people (Production). Common formats include: Less elegant for deeply nested

Popular in DevOps (Kubernetes, Docker) for its human-readability and support for nested data structures.