C

main.c

#include <stdio.h>
int main()
{
    printf("Hello\n");
    return 0；
}

C++

main.cpp

#include <string>
#include <iostream>

using namespace std;

int main()
{
    cout << "Hello" << endl;
    return 0；
}

Java

HelloWorld.java

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

C#

public class HelloWorld
{
    public static void Main()
    {
        System.Console.WriteLine("Hello");
    }
}

Golang

package main

import (
    "fmt"
)

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