在线编码器

JavaScript

Live Editor

function helloWorld() { console.log('Hello, world!'); }

function helloWorld() {
  console.log('Hello, world!');
}

Result

Error: Minified React error #152; visit https://reactjs.org/docs/error-decoder.html?invariant=152&args[]=helloWorld for the full message or use the non-minified dev environment for full errors and additional helpful warnings.

Python

Live Editor

def hello_world(): print("Hello, world!")

def hello_world():
  print("Hello, world!")

Result

SyntaxError: Unexpected token (1:12)
1 : return (def hello_world():
                ^

Java

Live Editor

class HelloWorld { public static void main(String args[]) { System.out.println("Hello, World"); } }

class HelloWorld {
  public static void main(String args[]) {
    System.out.println("Hello, World");
  }
}

Result

SyntaxError: Unexpected token (2:9)
1 : return (class HelloWorld {
2 :   public static void main(String args[]) {
             ^

html

Live Editor

<div>Hello World!</div>

<div>Hello World!</div>

Result

Hello World!