As we saw in the previous recipes in this chapter, macros can save a lot of writing and provide convenience functions without having to rethink the entire application architecture. Consequently, the Rust standard library provides several macros for a range of features that might otherwise be surprisingly complex to implement. One example is cross-platform prints—how would that work? Is there an equivalent way to output console text for every platform? What about color support? What is the default encoding? There are a lot of questions, which is an indicator of how many things need to be configurable—yet in a typical program, we only call print!("hello") and it works. Let's see what else there is.