intro-to-python/02_functions_review_and_exercises.ipynb

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   "source": [
    "# Chapter 2: Functions & Modularization"
   ]
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   "metadata": {},
   "source": [
    "## Content Review"
   ]
  },
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   "source": [
    "Read [Chapter 2](https://nbviewer.jupyter.org/github/webartifex/intro-to-python/blob/master/02_functions.ipynb) of the book. Then work through the ten review questions."
   ]
  },
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   "metadata": {},
   "source": [
    "### Essay Questions "
   ]
  },
  {
   "cell_type": "markdown",
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   "source": [
    "Answer the following questions briefly with *at most* 300 characters per question!"
   ]
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  {
   "cell_type": "markdown",
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   "source": [
    "**Q1**: What property of the `def` statement makes it a **statement**? Is there a way to use an **expression** to create a function?"
   ]
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    " "
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    "**Q2**: One of the first confusions of experienced programmers coming from other languages to Python regards the observation that **\"everything in Python is an object\"** (cf., this [discussion](https://www.reddit.com/r/learnpython/comments/8rypx9/everything_in_python_is_an_object/)). How does this relate to **functions**?"
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    " "
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   "source": [
    "**Q3**: What does it mean for a variable to **go out of scope**?"
   ]
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   "source": [
    " "
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "**Q4**: How can a **global** variable be **shadowed**? Is this good or bad?"
   ]
  },
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    " "
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   "source": [
    "**Q5**: Explain the concept of **forwarding** a function **call**."
   ]
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    " "
   ]
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   "source": [
    "**Q6**: What are **keyword-only arguments** and when is it appropriate to use them?"
   ]
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    " "
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   "metadata": {},
   "source": [
    "### True / False Questions"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Motivate your answer with *one short* sentence!"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "**Q7**: A mere function **call** is just an **expression**."
   ]
  },
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   "source": [
    " "
   ]
  },
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   "metadata": {},
   "source": [
    "**Q8**: When using the `import` statement, we need to ensure that the imported attributes do **not** overwrite any already defined variables and functions."
   ]
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    " "
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   "metadata": {},
   "source": [
    "**Q9:** Functions always have a name by which we can call them."
   ]
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    " "
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   "source": [
    "**Q10**: The [standard library](https://docs.python.org/3/library/index.html) is a collection of numerical tools often used in scientific computing, for example, advanced mathematical functions or utilities for simulation."
   ]
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    " "
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   "source": [
    "## Coding Exercises"
   ]
  },
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   "metadata": {},
   "source": [
    "### Volume of a Sphere"
   ]
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   "source": [
    "**Q11.1**: The [volume of a sphere](https://en.wikipedia.org/wiki/Sphere) is defined as $\\frac{4}{3} * \\pi * r^3$. Calculate this value for $r=10.0$ and round it to 10 digits after the comma. Use the [standard library](https://docs.python.org/3/library/index.html) to obtain a good approximation of $\\pi$."
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    "**Q11.2**: Encapsulate the logic into a function `sphere_volume()` that takes one *positional* argument `radius` and one *keyword-only* argument `digits` defaulting to `5`. The volume should be returned as a `float` object under *all* circumstances. Document your work appropriately in a docstring according to [Google's Python Style Guide](https://github.com/google/styleguide/blob/gh-pages/pyguide.md)."
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    "\n",
    "\n",
    "\n",
    "\n",
    "\n",
    "\n",
    "\n",
    "\n",
    "\n",
    "\n",
    "\n"
   ]
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   "source": [
    "**Q11.3**: Evaluate the function with `radius = 100.0` and 1, 5, 10, 15, and 20 digits respectively."
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   "source": [
    "**Q11.4**: What observation do you make?"
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    "**Q11.5**: Using the [range()](https://docs.python.org/3/library/functions.html#func-range) built-in, write a `for`-loop and calculate the volume of a sphere with `radius = 42.0` for all `digits` from `1` through `20`. Print out each volume on a seperate line.\n",
    "\n",
    "Note: This is the first task where you actually need to use the [print()](https://docs.python.org/3/library/functions.html#print) built-in function."
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    "\n"
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   "source": [
    "**Q11.6**: What important lesson did you learn about the `float` type?"
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