A small language with big opinions.

FlowLang installs from a single setup file. You get the IDE, interpreter, and package manager—no compilers, no SDKs, no extra steps.

Installer‑first Win32 IDE AI entry point Online package registry
Download installer Publish a package
Once installed, just open “FlowLang IDE” and start writing. Everything else is built in.
main.flow 
func greet(name) {
    std.print("hello, ")
    std.print(name)
}

let who = "flowlang"
greet(who)
Setup

Install FlowLang

FlowLang is distributed as a single installer.

1. Download the FlowLang installer
2. Run it
3. Launch "FlowLang IDE" from your desktop or start menu

After installation you get:

  • FlowLang IDE — graphical editor and runner
  • FlowLang Interpreter — command‑line runner (optional)
  • Package Manager — connected to this website’s registry

No extra setup:

  • No compiler required
  • No SDKs or environment variables
  • Everything the language needs ships inside the installer

Advanced users can still build from source, but normal users just install and start writing FlowLang.

Language

Core syntax

Basics

Variables, arithmetic, and printing:

let x = 10
let y = x * 2

if y > 10 {
    print("big")
} else {
    print("small")
}

Functions

Reusable logic with func and return:

func add(a, b) {
    return a + b
}

print(add(2, 3))
Packages

Using packages

Install from the registry

From the IDE:

  • Open Packages → Browse…
  • Search for a package by name
  • Click Install

From the command line (optional):

flowlang pkg install my-math-lib
flowlang pkg list
flowlang pkg remove my-math-lib

What a package is

A FlowLang package is a single .flowpkg file that contains:

  • manifest.txt — name, version, description
  • One or more .flow source files

The installer configures the package manager to talk to this site’s registry.

Publish

Upload a package

Create your package

On your machine (after installing FlowLang):

my-math-lib/
  manifest.txt
  src/
    math.flow

manifest.txt example:

name: my-math-lib
version: 1.0.0
author: your-name
description: Extra math helpers
entry: src/math.flow

Then bundle it into a .flowpkg file (your tooling or a simple script can zip it).

Upload to the registry

Use this form to publish your .flowpkg so anyone can install it via the IDE or CLI.

The server will validate your manifest and make the package available in the registry.