replit IDE

To write our programs in future labs, we will be using the replit online integrated development environment (IDE). replit is a code editor that exists entirely in your web browser. As such, you do not need to download or install any software, and it works on a wide range of devices (Mac and Windows laptops/desktops, Chromebooks, iPads and other tablets, and even iPhone and Android phones). replit also offers a “multiplayer” feature where multiple people can collaborate on the same program at the same time, making it easier for you to work with lab helpers or professors to get assistance.

There is no programming component to this pre-lab, so all you need to do is sign up for a replit account and share your username with the CSCI 150 staff. Please do this before you arrive for Lab 1 so that your professor can add you to the class replit Team. To do so, please follow these steps:

  1. In your web browser, go to
  2. Click on the Sign up button in the top right corner of the webpage.
  3. Choose a username and password, and enter in an email address (we recommend that you use your Oberlin email address).
  4. Then click the Create account button.
  5. Fill out this Google Form to provide us with your username. We need this so that we can add you the the class replit Team.


Occasionally, you will find one of these Extra boxes in your lab. These boxes contain completely optional material that is meant to point you towards exciting areas to explore or problems to solve. Keep an eye out for these Extra boxes because they can sometimes earn you bonus points.

For this pre-lab, we encourage you to explore replit. Begin by taking a look around and clicking on some buttons. You can start your first program by clicking on the + Create repl button in the left hand corner of the replit home page. A dialog box will pop up where you can select Python as your language. Please note that replit automatically generates a random, nonsensical name for your new project. You’re free to rename the project if you’d like. When you’re ready, click the + Create repl button in the dialog box and you’ll be ready to go.