Python 2.3

Circle Area Calculator 2.0

  • Fully automatically graded on code quality, style, structure and functionality
  • Students write their solution in an online IDE in their LMS
  • Check for Python code plagiarism


  • Print statement.
  • Input function.
  • Variables.

Learning goals:

  • Put input statements into practice.
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You have already created a Circle Area Calculator in assignment 1.5. Remember? You implemented the formula and used a `PI` constant with the value of `3.14`.

Now that we know how to ask the user for input, we can make this script way more powerful. We can now ask the user to give us the circle radius, instead of hardcoding it in our code!

Let’s edit our `` script so that we ask the user to input the radius by asking them `”What is the radius of the circle?”`. You can now use this input, which you can convert to an integer number using the `int()` function, to calculate the area of this circle!

Please note: Play around with your script and see if you can make it crash. What happens, for instance, if you give an unexpected input like a word? You will learn how to prevent this crash in the next assignment.

Example usage:

-!- CODE language-bash -!-$ python3
What is the radius of the circle? 8

$ python3
What is the radius of the circle? 99

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