REPL

Run praia with no arguments to start the interactive REPL (Read-Eval-Print Loop).

$ praia
Praia REPL (type 'exit' to quit)
>> 2 + 3
5
>> let x = 10
>> x * 2
20
>> "hello".upper()
HELLO

Features

• Arrow keys for command history (up/down) and line editing (left/right). Requires readline or libedit.
• Auto-print — expression results are printed automatically. nil results are hidden.
• Multi-line input — detected automatically when braces are unbalanced:

>> func greet(name) {
..   print("hello %{name}")
.. }
>> greet("world")
hello world

• Persistent state — variables, functions, and classes survive between inputs.
• Exit with Ctrl-D or type exit.

Command-line flags

praia                             # start REPL
praia --tree                      # REPL with tree-walker interpreter

The REPL uses the bytecode VM by default. Pass --tree to use the tree-walking interpreter instead.