Repls currently run in one of two modes: Eval Mode and Project Mode. Each has different behaviors and limitations. Read on to learn more about each.
A fresh repl (with the exception of repls that begin with multiple files) begin in Eval Mode. In eval mode, you can evaluate code from the console (including values declared in your program).
For example, in the following repl, try running the repl, then using the console to evaluate expressions that use the defined values.
If you are using python, you can also clear the console by using our custom
import replit replit.clear()
Repls in eval mode, however, cannot support additional files of the same filetype
(e.g. only one
.js file, depending on the language). If your program
programmatically creates those files, your repl will be forced into project mode.
You can always return to eval mode by ensuring you only have one file with the extension
of your language. This means that you can have media files (like
and still remain in eval mode.
In any language where we support multiple files, you can enter Project Mode by creating a file - either by clicking on the icon. Or upload one from your computer by clicking and give it the same extension as the main file. Once a file has been uploaded or added, it can be dragged into any existing folder.
In project mode, you no longer have access to globally defined variables in the console.
You also cannot
import replit to clear the console in python/python3. However, you do
have access to multiple files and folders. The first file (typically named
always be the program's entry point. You can create files both manually and programmatically.
We support uploading any file type including images, video, and audio files, which will be displayed correctly in the browser. These files can also be programmatically generated.
For example, you can upload an image, alter it programmatically, and save the result to a new image. Like this (which you can try out here):
This will put you in project mode which behaves slightly differently than the normal repl. Keep in mind The first file is always the entry point (typically named main), you won't be able to evaluate code in the console (it can only be used for STDIN), and any changes your program makes to files will be updated live.
You can edit a file's name or delete it if you wish by clicking on the icon beside it. If you're renaming your file, make sure you have the right extension for it.
Two things to note about files:
Here's a few examples on files in different languages:
While you can programmatically create files in project mode, there are a few caveats: