Ballerina

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Ballerina is an open source programming language created in 2015 by Sanjiva Weerawarana and James Clark and Sameera Jayasoma and Hasitha Aravinda and Srinath Perera and Frank Leymann.

Source code:

git clone https://github.com/ballerina-platform/ballerina-lang

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Ballerina is a compiled, type-safe, concurrent programming language targeting microservice development and integration.It is an open source project started in 2015 by architects from WSO2 as code-based alternative to the configuration-based integration tools such as EAI, ESB, and workflow products.Ballerina has various constructs geared toward cloud-native development including support for modern data formats and protocols, reliability, distributed transactions, APIs, and event streams.. Read more on Wikipedia...

Ballerina website
Ballerina Wikipedia page
Ballerina is developed on GitHub and has 3,093 stars
Ballerina docs
There are at least 1,483 Ballerina repos on GitHub
Ballerina first developed in WSO2
file extensions for Ballerina include bal
Ballerina on Twitter
The Google BigQuery Public Dataset GitHub snapshot shows 21 users using Ballerina in 22 repos on GitHub
Ballerina LSP implementation
GitHub supports syntax highlighting for Ballerina
There is a central package repository for Ballerina
ballerina.io was registered in 2017
See also: (3 related languages)Java, Go, Rust

Example from hello-world:

import ballerina/io;

public function main() {
    io:println("Hello World");
}

Example from Linguist:

import ballerina.lang.system;

function main (string[] args) {
    system:println("Hello, World!");
}

Example from Wikipedia:

// The simplest hello world REST API
// To run it:
// ballerina run demo.bal
// To invoke:
// curl localhost:9090/hello/hi

import ballerina/http;

service<http:Service> hello bind {port:9090} {
  hi (endpoint caller, http:Request request) {
      http:Response res;
      res.setTextPayload("Hello World!\n");
      _ = caller->respond(res);
  }
}

Feature	Supported	Token	Example
Strings	✓	"	"Hello world"
Print() Debugging	✓	io:println
Line Comments	✓	//	// A comment
File Imports	✓		import ballerina/http; import ballerina/io;
Comments	✓		// A comment
Semantic Indentation	X

Ballerina - Programming language

Language features