Run your first program

This is real Python, running in your browser. Press ▶ Run below. The first run takes a few seconds while Python loads.

# Marks as a bar chart. Change a number
# or the name, then press Run again.
name = "Asha"
marks = {"Maths": 72, "Physics": 85,
         "Coding": 93, "English": 64}

print("Report for", name)
for subject, mark in marks.items():
    bar = "█" * (mark // 5)
    print(f"{subject:8} {mark:3} {bar}")

average = sum(marks.values()) / len(marks)
print("Average:", round(average, 1))
print("Best:", max(marks, key=marks.get))

Now change it

• Press Edit, change Coding's 93 to 40, and run it again. Which subject is best now?
• Add another subject inside the { }, such as , "Chemistry": 78 straight after English's mark.
• Broke it? Read the last line of the error to see what went wrong, or press Reset to start again.

Every course here works the same way: a short explanation, then real programs you can run and change.