[![Minimum rustc version](https://img.shields.io/badge/rustc-1.38+-brightgreen)](https://github.com/rust-lang/rust)
[![The Crate `hello_trait` Code](https://img.shields.io/badge/crate-code-yellowgreen)](https://github.com/cnruby/learn-rust-by-crates/tree/master/hello-trait)
[![Build Status on appveyor.com](https://img.shields.io/appveyor/ci/cnruby/learn-rust-by-crates?label=build%20on%20appveyor.com)](https://github.com/cnruby/learn-rust-by-crates/tree/master/hello-trait)
[![GitHub issues](https://img.shields.io/github/issues/cnruby/learn-rust-by-crates)](https://github.com/cnruby/learn-rust-by-crates/issues)
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## Getting Started
- Learn the crate [hello_exercism](https://crates.io/crates/hello_exercism)

## The Rust Feature trait and impl
<img src="https://github.com/cnruby/learn-rust-by-crates/raw/master/hello-trait/lib-hello/images/hello-trait-05-complex.png"/>

## About this Crate `hello_trait`
- Why to need the Rust Feature trait
- How to Understand the Rust Feature trait
- How to Understand the Rust Feature impl
- Was is the relation between trait and impl