How to switch between Rust toolchains?

Question

rustup help toolchain lists the following sub-commands

SUBCOMMANDS:
    list         List installed too         


        

Answer 1

The rustup default stable command works well, but the easiest way is to keep a rust-toolchain file inside your project root folder. This is similar to a .nvm file for a NodeJS project.

rust-toolchain

nightly

or

stable