pith repl

pith repl
# or simply:
pith

Interactive Read-Eval-Print Loop (REPL) for experimenting with Pith syntax, exploring APIs, and testing code.

Interactive Sessions

When launched with no arguments or with pith repl, the Pith shell displays the interactive prompt:

pith 0.1.0 interactive repl
type exit or press ctrl+d to quit

pith> x = 10
pith> x + 32
42

Bare expressions are automatically evaluated and formatted to stdout.

Multi-line blocks (if, while, fn) continue across lines using the ... continuation prompt until closed with matching end statements:

pith> fn greet(name)
...       return "hello, " + name
...   end
pith> greet("world")
hello, world

Variable declarations (name = val, mut name = val) and function declarations persist across evaluations in the REPL session:

pith> mut count = 0
pith> while count < 3
...       print count
...       count = count + 1
...   end
0
1
2

To exit the REPL, type exit and press Enter, or send EOF via Ctrl+D.