Online Python IDE: write and run Python in your browser

Free online Python editor and interpreter. Write Python 3 code, press Run and see the output instantly. Your code runs on your own device with Pyodide (WebAssembly), so nothing is sent to a server. NumPy, pandas, Matplotlib and other tested packages load automatically when you import them. Supports multiple files, standard input, downloads and saved projects. New to Python? Start with the Python tutorial or practise with Python exercises.

LessonPython else on Loops: The else block of a for or while loop runs once when the loop finishes normally, and is skipped when a break ends the loop. Back to lesson
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