MOD03_1-4.2_Intro_Python.ipynb

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    "# 1-4.2 Intro Python\n",
    "## Conditionals \n",
    "- **`if`, `else`, `pass`**  \n",
    "  - Conditionals using Boolean String Methods\n",
    "  - **Comparison operators**\n",
    "  - String comparisons\n",
    "\n",
    "----- \n",
    "\n",
    "><font size=\"5\" color=\"#00A0B2\"  face=\"verdana\"> <B>Student will be able to</B></font>  \n",
    "- **control code flow with `if`... `else` conditional logic**  \n",
    "  - using Boolean string methods (`.isupper(), .isalpha(), startswith()...`)  \n",
    "  - **using comparison (`>, <, >=, <=, ==, !=`)**  \n",
    "  - using Strings in comparisons  "
   ]
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   "source": [
    "# &nbsp;\n",
    "<font size=\"6\" color=\"#00A0B2\"  face=\"verdana\"> <B>Concepts</B></font>  \n",
    "\n",
    "## comparison operators \n",
    " - **`>`**\n",
    " - **`<`**\n",
    " - **`>=`**, **`<=`**\n",
    " - **`==`**\n",
    " - Assign **`=`** vs compare **`==`**\n",
    " - **`!=`** \n",
    " \n",
    "[![view video](https://iajupyterprodblobs.blob.core.windows.net/imagecontainer/common/play_video.png)]( http://edxinteractivepage.blob.core.windows.net/edxpages/f7cff1a7-5601-48a1-95a6-fd1fdfabd20e.html?details=[{\"src\":\"http://jupyternootbookwams.streaming.mediaservices.windows.net/cf192500-3879-4228-bd50-70dd3f38d831/Unit1_Section4.2-comparison-operators.ism/manifest\",\"type\":\"application/vnd.ms-sstr+xml\"}],[{\"src\":\"http://jupyternootbookwams.streaming.mediaservices.windows.net/cf192500-3879-4228-bd50-70dd3f38d831/Unit1_Section4.2-comparison-operators.vtt\",\"srclang\":\"en\",\"kind\":\"subtitles\",\"label\":\"english\"}])"
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   "source": [
    "# &nbsp;\n",
    "<font size=\"6\" color=\"#00A0B2\"  face=\"verdana\"> <B>Examples</B></font>"
   ]
  },
  {
   "cell_type": "code",
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       "False"
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   "source": [
    "# [ ] review and run code to see if 3 greater than 5\n",
    "3 > 5"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [
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       "True"
      ]
     },
     "execution_count": 2,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "# [ ] review and run code to see if 3 less than or equal to 5\n",
    "3 <= 5"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {},
   "outputs": [
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       "False"
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     "execution_count": 3,
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   ],
   "source": [
    "# [ ] review and run code \n",
    "\n",
    "# assign x equal to 3\n",
    "x = 3\n",
    "\n",
    "# test if x is equal to\n",
    "x == 9"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "x not equal 9 is True\n",
      "x equal 3 is True\n"
     ]
    }
   ],
   "source": [
    "# [ ] review and run code \n",
    "x = 3\n",
    "print(\"x not equal 9 is\", x != 9)\n",
    "print(\"x equal 3 is\", x == 3)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "collapsed": true
   },
   "source": [
    "# &nbsp;\n",
    "<font size=\"6\" color=\"#B24C00\"  face=\"verdana\"> <B>Task 1</B></font>  \n",
    "## comparison operators"
   ]
  },
  {
   "cell_type": "code",
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   "outputs": [
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     "text": [
      "x is equal to 13: True\n"
     ]
    }
   ],
   "source": [
    "x = 9 + 4\n",
    "# [ ] create a test to print() True or False for x is equal to 13\n",
    "print(\"x is equal to 13:\" , x == 13)\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 11,
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       "False"
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     "execution_count": 11,
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   ],
   "source": [
    "# [ ] create a test to print True or False for 3 + 3 is greater than 2 + 4\n",
    "(3+3) > (2+4)\n"
   ]
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   "metadata": {
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   "source": [
    "# &nbsp;\n",
    "<font size=\"6\" color=\"#00A0B2\"  face=\"verdana\"> <B>Concepts</B></font>  \n",
    "\n",
    "## Conditionals: comparison operators with `if`\n",
    "[![view video](https://iajupyterprodblobs.blob.core.windows.net/imagecontainer/common/play_video.png)]( http://edxinteractivepage.blob.core.windows.net/edxpages/f7cff1a7-5601-48a1-95a6-fd1fdfabd20e.html?details=[{\"src\":\"http://jupyternootbookwams.streaming.mediaservices.windows.net/15e3b015-e83b-4ab8-8375-b11e52a348ea/Unit1_Section4.2-conditional-if.ism/manifest\",\"type\":\"application/vnd.ms-sstr+xml\"}],[{\"src\":\"http://jupyternootbookwams.streaming.mediaservices.windows.net/15e3b015-e83b-4ab8-8375-b11e52a348ea/Unit1_Section4.2-conditional-if.vtt\",\"srclang\":\"en\",\"kind\":\"subtitles\",\"label\":\"english\"}])\n",
    "Comparison operators evaluate to Boolean **`True`** and **`False`** to direct the flow of **`if`** conditionals"
   ]
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   "source": [
    "### &nbsp;\n",
    "<font size=\"6\" color=\"#00A0B2\"  face=\"verdana\"> <B>Examples</B></font>"
   ]
  },
  {
   "cell_type": "code",
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   "outputs": [
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     "text": [
      "x was 21\n",
      "now x is 25\n"
     ]
    }
   ],
   "source": [
    "# review code and run cell\n",
    "x = 21\n",
    "if x > 25:\n",
    "    print(\"x is already bigger than 25\")\n",
    "else:\n",
    "    print(\"x was\", x)\n",
    "    x = 25\n",
    "    print(\"now x is\", x)"
   ]
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   "cell_type": "code",
   "execution_count": 13,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Pass: x + 18 is equal to 36\n"
     ]
    }
   ],
   "source": [
    "# review code and run cell\n",
    "x = 18\n",
    "if x + 18 == x + x:\n",
    "    print(\"Pass: x + 18 is equal to\", x + x)\n",
    "else:\n",
    "    print(\"Fail: x + 18 is not equal to\", x + x)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 14,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "x is 18\n"
     ]
    }
   ],
   "source": [
    "# review code and run cell. \"!\" means \"not\"\n",
    "x = 18\n",
    "test_value = 18\n",
    "if x != test_value:\n",
    "    print('x is not', test_value)\n",
    "else:\n",
    "    print('x is', test_value)\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 16,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "\"==\" tests for, is equal to\n"
     ]
    }
   ],
   "source": [
    "# review code and run cell\n",
    "# DON'T ASSIGN (x = 2) when you mean to COMPARE (x == 2)\n",
    "x = 2\n",
    "\n",
    "if x == 2:\n",
    "    print('\"==\" tests for, is equal to')\n",
    "else:\n",
    "    pass"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "collapsed": true
   },
   "source": [
    "# &nbsp;\n",
    "<font size=\"6\" color=\"#B24C00\"  face=\"verdana\"> <B>Task 2</B></font>  \n",
    "## Evaluating a comparison operator in `if`"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 20,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "y greater than or equal x + x is: False\n"
     ]
    }
   ],
   "source": [
    "# [ ] create an if/else statement that tests if y is greater than or equal x + x \n",
    "# [ ] print output: \"y greater than or equal x + x is\" True/False ...or a similar output\n",
    "x = 20\n",
    "y = x + 8\n",
    "\n",
    "if y>= x+x :\n",
    "    print(\"y greater than or equal x + x is: True\")\n",
    "else:\n",
    "    print(\"y greater than or equal x + x is: False\")\n"
   ]
  },
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   "cell_type": "markdown",
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    "[Terms of use](http://go.microsoft.com/fwlink/?LinkID=206977) &nbsp; [Privacy & cookies](https://go.microsoft.com/fwlink/?LinkId=521839) &nbsp; © 2017 Microsoft"
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