Crates/Env Logger

How to use env_logger crate in Rust environment logger Initialize env_logger in Rust by adding the dependency and calling env_logger::init() in main to enable RUST_LOG environment variable control. How to Use env_logger in Rust Initialize env_logger in Rust by adding the dependency, calling env_logger::init(), and setting the RUST_LOG environment variable. How to Use fern for Custom Log Configuration in Rust Use `fern` to build a flexible logging pipeline by chaining configuration methods that define output destinations, formatting, and filtering levels, then initialize it once at the start of your application.