Programming Fundamentals/Introduction/JavaScript

hello.js

// This script displays "Hello world!"
//
// References:
//   http://javascript.info/hello-world
//   https://www.w3schools.com/js/js_output.asp
//   http://progopedia.com/example/hello-world/114/

output("Hello world!")

function output(text) {
  if (typeof document === 'object') {
    document.write(text);
  } 
  else if (typeof console === 'object') {
    console.log(text);
  } 
  else {
    print(text);
  }
}

Try It

Copy and paste the code above into one of the following free online development environments or use your own JavaScript compiler / interpreter / IDE.

• Chapman.edu: Online JavaScript Interpreter
• CodeChef
• GDB Online
• Ideone
• JS.do
• paiza.IO
• PythonTutor
• repl.it

See Also

• JavaScript.info: Hello, World!
• w3Schools: JavaScript Output
• Progopedia: JavaScript Hello World Example

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