Basic “Hello, World!” application using Django and Ruby on Rails.

Django Example:

1. Install Django (if not already installed):

pip install django

2. Create a new Django project:

django-admin startproject hello_django

3. Change directory to the newly created project:

cd hello_django

4. Create a new Django app:

python manage.py startapp hello_app

5. Open hello_app/views.py and add the following code:

from django.http import HttpResponse

def hello(request):
    return HttpResponse("Hello, Django!")

6. Open hello_django/urls.py and add the following code:

from django.urls import path
from hello_app import views

urlpatterns = [
    path('', views.hello, name='hello'),
]

7. Run the Django development server:

python manage.py runserver

8. Open your web browser and navigate to http://localhost:8000 to see the “Hello, Django!” message.

Ruby on Rails Example:

1. Install Ruby on Rails (if not already installed):

gem install rails

2. Create a new Rails application:

rails new hello_rails

3. Change directory to the newly created application:

cd hello_rails

4. Generate a new controller and view:

rails generate controller welcome hello

5. Open app/controllers/welcome_controller.rb and add the following code:

class WelcomeController < ApplicationController
  def hello
  end
end

6. Open app/views/welcome/hello.html.erb and add the following code:

<h1>Hello, Rails!</h1>

7. Open config/routes.rb and add the following code:

Rails.application.routes.draw do
  get 'welcome/hello'
  root 'welcome#hello'
end

8. Run the Rails server:

rails server

9. Open your web browser and navigate to http://localhost:3000 to see the “Hello, Rails!” message.

These examples demonstrate the basic setup and structure of a “Hello, World!” application using Django and Ruby on Rails. You can further explore these frameworks to build more complex web applications.