X10 - Programming language

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X10 is an open source programming language created in 2004 by Kemal Ebcioğlu and Saravanan Arumugam and Vijay Saraswat and Vivek Sarkar.

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X10 is a programming language being developed by IBM at the Thomas J. Watson Research Center as part of the Productive, Easy-to-use, Reliable Computing System (PERCS) project funded by DARPA's High Productivity Computing Systems (HPCS) program. Its primary authors are Kemal Ebcioğlu, Vijay Saraswat, Saravanan Arumugam, and Vivek Sarkar. Read more on Wikipedia...

Tags: programming language
There are at least 45 X10 repos on GitHub
Early development of X10 happened in IBM
The Google BigQuery Public Dataset GitHub snapshot shows 18 users using X10 in 19 repos on GitHub
Explore X10 snippets on Rosetta Code
X10 on HOPL
X10 appears in the TIOBE Index
Pygments supports syntax highlighting for X10
GitHub supports syntax highlighting for X10
x10-lang.org was registered in 2008
See also: (5 related languages) Linux, Java, Chapel, Fortress, UPC
1 PLDB concepts link to X10: Chapel

Example from hello-world:

/*
 *  This file is part of the X10 project (http://x10-lang.org).
 *
 *  This file is licensed to You under the Eclipse Public License (EPL);
 *  You may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *      http://www.opensource.org/licenses/eclipse-1.0.php
 *
 *  (C) Copyright IBM Corporation 2006-2016.
 */

import x10.io.Console;

public class HelloWorld {
  public static def main(Rail[String]) {
      Console.OUT.println("Hello World");
  }
}

Example from Linguist:

/*
 *  This file is part of the X10 project (http://x10-lang.org).
 *
 *  This file is licensed to You under the Eclipse Public License (EPL);
 *  You may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *      http://www.opensource.org/licenses/eclipse-1.0.php
 *
 *  (C) Copyright IBM Corporation 2006-2014.
 */

import x10.io.Console;

/**
 * The classic hello world program, shows how to output to the console.
 */
class HelloWorld {
  public static def main(Rail[String]) {
      Console.OUT.println("Hello World!" );
  }
}

X10 Keywords

as assert async at athome ateach atomic break case catch class clocked continue def default do else final finally finish for goto haszero here if import in instanceof interface isref new offer operator package return struct switch throw try type val var when while

Language features

Feature	Supported	Example	Token
Line Comments	✓
Conditionals	✓
Async Await	✓
Switch Statements	✓
Functions	✓
Exceptions	✓
Classes	✓
While Loops	✓
File Imports	✓	import x10.io.Console;	import
Strings	✓	"Hello world"	"
Comments	✓	/* A comment */
MultiLine Comments	✓	/* A comment */	/* */
Print() Debugging	✓		Console.OUT.println
Semantic Indentation	X