不积跬步，无以至千里。

CC++C#JavaPHPGoPythonNodeRubyQt

#include <stdio.h>

int main(void) {
  printf("Hello World!\n");
  return 0;
}

#include <iostream>

int main(void) {
  std::cout << "Hello World!" << std::endl;
  return 0;
}

using System;
namespace helloWod
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("Hello World!");
        }
    }
}

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

<?php
  echo "Hello World!";

package main
import "fmt"
func main(){
  fmt.Println("Hello World!")
}

print('Hello World!')

console.log("Hello World!");

puts "Hello World!"

#include <QApplication>
#include <QLabel>

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);

    QLabel label("Hello, world");
    label.show();

    return app.exec();
}

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