A real session, recorded — currency and dates as first-class values, arbitrary-precision integers, and the ? inspector. Press play.
This is wit, the Tungsten REPL — ? EXPR inspects a value, :help NAME pulls up docs, and token scrubbing lets you nudge a literal with the arrow keys and watch the result update live. Install Tungsten and run bin/tungsten --repl to try it yourself.
Prefer your own terminal? asciinema play repl-demo.cast