Basically a build tool and an package manager in one.
Builds the program into an executable binary and downloads dependencies.
Cargo.toml file is for the projects metadata
src dir is where the code files are at
When using Cargo run it compiles and runs the code in debug mode
Cargo.lock file specifies the version of all the dependencies
println! a macro for printing to stdout
eprintln! a macro for printing to stderr
Rust Strings are always UTF-8
Vec<_> is shorthand for vector which is a collection type that can expand dynamically, the _ is to infer the type of the elements