Did you see that? Python said:
NameError: name 'sqrt' is not defined. Python doesn’t know what square roots are—yet.
There is a Python module named
math that includes a number of useful variables and functions, and
sqrt() is one of those functions. In order to access
math, all you need is the
import keyword. When you simply import a module this way, it’s called a generic import.
You’ll need to do two things here:
import mathon line 2 in the editor.
sqrt()so that it has the form
math.sqrt(). This tells Python not only to
import math, but to get the
sqrt()function from within
math. Then hit Run to see what Python now knows.