# Lesson goal: The number $\pi$

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As introduced in a previous lesson, programming languages know how to "crunch" quite a bit of mathematics. In this case, let's study now to handle the famous number $\pi$ which is equal to 3.1415... . Here is the symbol to use for $\pi$ in your code:
math.pi
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Notice the pi in the name. The prefix of math. means that pi is included in the "math" library that the computer knows about. This something.something notation is very common in computer programming.

# Now you try. See if you can get $\pi$ to display. Try print(math.pi).

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