{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "54\n"
     ]
    }
   ],
   "source": [
    "x = 6 * 7 + 12\n",
    "print(x)"
   ]
  },
  {
   "cell_type": "raw",
   "metadata": {},
   "source": [
    "In the hub, create a text file, Python console and terminal window. Put in three panels. Send thumbs up."
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "1. Use number\n",
    "1. to create \n",
    "1. numbered list"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "* You can use indents\n",
    "    * To create sublists\n",
    "    * of the same type\n",
    "* or sublists"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## A Level-2 Heading"
   ]
  },
  {
   "cell_type": "raw",
   "metadata": {},
   "source": [
    "\n",
    "   1. Get funding.\n",
    "   2.  Do work.\n",
    "        * Design experiment.\n",
    "        * Collect data.\n",
    "        * Analyze.\n",
    "    3. Write up.\n",
    "    4. Publish.\n",
    "    \n",
    "    Create the above using Markdowns.\n"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "$\\sum_{i=1}^{N} 2^{-i} \\approx 1$"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    " 1. Get funding.\n",
    " 1. Do work.\n",
    "     * Design experiment.\n",
    "     * Collect data.\n",
    "     * Analyze.\n",
    " 1. Write up.\n",
    " 1. Publish."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "metadata": {},
   "outputs": [],
   "source": [
    "age = 42\n",
    "first_name = 'David'"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "David is 42 years old\n"
     ]
    }
   ],
   "source": [
    "print(first_name, 'is', age, 'years old')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 7,
   "metadata": {},
   "outputs": [
    {
     "ename": "NameError",
     "evalue": "name 'last_name' is not defined",
     "output_type": "error",
     "traceback": [
      "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[0;31mNameError\u001b[0m                                 Traceback (most recent call last)",
      "\u001b[0;32m<ipython-input-7-a637c5453549>\u001b[0m in \u001b[0;36m<module>\u001b[0;34m\u001b[0m\n\u001b[0;32m----> 1\u001b[0;31m \u001b[0mprint\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mlast_name\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m",
      "\u001b[0;31mNameError\u001b[0m: name 'last_name' is not defined"
     ]
    }
   ],
   "source": [
    "print(last_name)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 8,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "age in three years: 45\n"
     ]
    }
   ],
   "source": [
    "age = age + 3\n",
    "print('age in three years:',age)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 10,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "h\n"
     ]
    }
   ],
   "source": [
    "atom_name = 'helium'\n",
    "print(atom_name[0])"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 11,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "hel\n"
     ]
    }
   ],
   "source": [
    "print(atom_name[0:3])"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 12,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "6\n"
     ]
    }
   ],
   "source": [
    "print(len('helium'))"
   ]
  },
  {
   "cell_type": "raw",
   "metadata": {},
   "source": [
    "# Command  # Value of x   # Value of y   # Value of swap #\n",
    "x = 1.0    #              #              #               #\n",
    "y = 3.0    #              #              #               #\n",
    "swap = x   #              #              #               #\n",
    "x = y      #              #              #               #\n",
    "y = swap   #              #              #               #\n",
    "What is the value after each line is executed\n",
    "\n",
    "x = 1.0 # 1 # not define # not define #\n",
    "y = 3.0 # 1 # 3          # not define #\n"
   ]
  }
 ],
 "metadata": {
  "kernelspec": {
   "display_name": "Python 3",
   "language": "python",
   "name": "python3"
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  "language_info": {
   "codemirror_mode": {
    "name": "ipython",
    "version": 3
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   "file_extension": ".py",
   "mimetype": "text/x-python",
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