In the Node and Python interpreters you'd use _, in browser JS consoles (and PHP shells like Psysh/Tinker) you'd use $_, in Picolisp @ (or @@ or @@@ for previou

In the Node and Python interpreters you'd use _, in browser JS consoles (and PHP shells like Psysh/Tinker) you'd use $_, in Picolisp @ (or @@ or @@@ for previous computations). I think most interactive programming shells has an equivalent.