Add if, for loop, def

diff --git a/Python/PresenterNotes.ipynb b/Python/PresenterNotes.ipynb
index b0425dc51a6be858a23da3df351535a963c532fc..2051fbbad9d89c1a1545b5db5da6e870bfc1597a 100644 (file)
--- a/Python/PresenterNotes.ipynb
+++ b/Python/PresenterNotes.ipynb
@@ -658,6 +658,309 @@
       "1. Make a dictionary and experiment using different types as keys. Can containers be keys?"
      ]
     }, 
+    {
+     "cell_type": "markdown", 
+     "source": [
+      "# If statements"
+     ]
+    }, 
+    {
+     "cell_type": "code", 
+     "collapsed": true, 
+     "input": [
+      "x = 5", 
+      "if x < 0:", 
+      "    print \"x is negative\""
+     ], 
+     "language": "python", 
+     "outputs": [], 
+     "prompt_number": 1
+    }, 
+    {
+     "cell_type": "code", 
+     "collapsed": false, 
+     "input": [
+      "x = -5", 
+      "if x < 0:", 
+      "    print \"x is negative\""
+     ], 
+     "language": "python", 
+     "outputs": [
+      {
+       "output_type": "stream", 
+       "stream": "stdout", 
+       "text": [
+        "x is negative"
+       ]
+      }
+     ], 
+     "prompt_number": 2
+    }, 
+    {
+     "cell_type": "code", 
+     "collapsed": false, 
+     "input": [
+      "x = 5", 
+      "if x < 0:", 
+      "    print \"x is negative\"", 
+      "else:", 
+      "    print \"x in non-negative\""
+     ], 
+     "language": "python", 
+     "outputs": [
+      {
+       "output_type": "stream", 
+       "stream": "stdout", 
+       "text": [
+        "x in non-negative"
+       ]
+      }
+     ], 
+     "prompt_number": 3
+    }, 
+    {
+     "cell_type": "code", 
+     "collapsed": false, 
+     "input": [
+      "x = 5", 
+      "if x < 0:", 
+      "    print \"x is negative\"", 
+      "elif x == 0:", 
+      "    print \"x is zero\"", 
+      "else:", 
+      "    print \"x is positive\""
+     ], 
+     "language": "python", 
+     "outputs": [
+      {
+       "output_type": "stream", 
+       "stream": "stdout", 
+       "text": [
+        "x is positive"
+       ]
+      }
+     ], 
+     "prompt_number": 4
+    }, 
+    {
+     "cell_type": "markdown", 
+     "source": [
+      "# Exercises", 
+      "1. Write an if statement that prints whether x is even or odd"
+     ]
+    }, 
+    {
+     "cell_type": "markdown", 
+     "source": [
+      "# Looping"
+     ]
+    }, 
+    {
+     "cell_type": "code", 
+     "collapsed": false, 
+     "input": [
+      "fruits = ['apples', 'oranges', 'pears', 'bananas']", 
+      "for fruit in fruits:", 
+      "    print fruit"
+     ], 
+     "language": "python", 
+     "outputs": [
+      {
+       "output_type": "stream", 
+       "stream": "stdout", 
+       "text": [
+        "apples", 
+        "oranges", 
+        "pears", 
+        "bananas"
+       ]
+      }
+     ], 
+     "prompt_number": 6
+    }, 
+    {
+     "cell_type": "code", 
+     "collapsed": false, 
+     "input": [
+      "# Use range for a range on integers", 
+      "for i in range(len(fruits)):", 
+      "    print i, fruits[i]"
+     ], 
+     "language": "python", 
+     "outputs": [
+      {
+       "output_type": "stream", 
+       "stream": "stdout", 
+       "text": [
+        "0 apples", 
+        "1 oranges", 
+        "2 pears", 
+        "3 bananas"
+       ]
+      }
+     ], 
+     "prompt_number": 17
+    }, 
+    {
+     "cell_type": "code", 
+     "collapsed": false, 
+     "input": [
+      "# Use zip to iterate over two lists at once", 
+      "fruits = ['apples', 'oranges', 'pears', 'bananas']", 
+      "prices = [0.49, 0.99, 1.49, 0.32]", 
+      "for fruit, price in zip(fruits, prices):", 
+      "    print fruit, \"cost\", price, \"each\"", 
+      "    "
+     ], 
+     "language": "python", 
+     "outputs": [
+      {
+       "output_type": "stream", 
+       "stream": "stdout", 
+       "text": [
+        "apples cost 0.49 each", 
+        "oranges cost 0.99 each", 
+        "pears cost 1.49 each", 
+        "bananas cost 0.32 each"
+       ]
+      }
+     ], 
+     "prompt_number": 8
+    }, 
+    {
+     "cell_type": "code", 
+     "collapsed": false, 
+     "input": [
+      "# Use \"items\" to iterate over a dictionary", 
+      "# Note the order is non-deterministic", 
+      "prices = {'apples': 0.49, 'oranges': 0.99, 'pears': 1.49, 'bananas': 0.32}", 
+      "for fruit, price in prices.items():", 
+      "    print fruit, \"cost\", price, \"each\"", 
+      "          "
+     ], 
+     "language": "python", 
+     "outputs": [
+      {
+       "output_type": "stream", 
+       "stream": "stdout", 
+       "text": [
+        "pears cost 1.49 each", 
+        "apples cost 0.49 each", 
+        "oranges cost 0.99 each", 
+        "bananas cost 0.32 each"
+       ]
+      }
+     ], 
+     "prompt_number": 10
+    }, 
+    {
+     "cell_type": "code", 
+     "collapsed": false, 
+     "input": [
+      "values = [42.0, 0.01, -32.0, -16.0, 0.0]", 
+      "values.sort()", 
+      "for x in values:", 
+      "    if x > 0.0:", 
+      "        print \"First non-negative value is\", x", 
+      "        break"
+     ], 
+     "language": "python", 
+     "outputs": [
+      {
+       "output_type": "stream", 
+       "stream": "stdout", 
+       "text": [
+        "First non-negative value is 0.01"
+       ]
+      }
+     ], 
+     "prompt_number": 9
+    }, 
+    {
+     "cell_type": "code", 
+     "collapsed": false, 
+     "input": [
+      "# Use continue to skip an iteration", 
+      "for x in values:", 
+      "    if x <= 0.0:", 
+      "        continue", 
+      "    print math.log(x)"
+     ], 
+     "language": "python", 
+     "outputs": [
+      {
+       "output_type": "stream", 
+       "stream": "stdout", 
+       "text": [
+        "-4.60517018599", 
+        "3.73766961828"
+       ]
+      }
+     ], 
+     "prompt_number": 13
+    }, 
+    {
+     "cell_type": "code", 
+     "collapsed": false, 
+     "input": [
+      "# Calculating a sum", 
+      "sum = 0", 
+      "for x in values:", 
+      "    sum = sum + x", 
+      "sum"
+     ], 
+     "language": "python", 
+     "outputs": [
+      {
+       "output_type": "pyout", 
+       "prompt_number": 15, 
+       "text": [
+        "-5.990000000000002"
+       ]
+      }
+     ], 
+     "prompt_number": 15
+    }, 
+    {
+     "cell_type": "markdown", 
+     "source": [
+      "# Exercises", 
+      "1. Using a loop, calculate the factorial of 42 (the product of all integers less than 42)."
+     ]
+    }, 
+    {
+     "cell_type": "markdown", 
+     "source": [
+      "# Functions"
+     ]
+    }, 
+    {
+     "cell_type": "code", 
+     "collapsed": false, 
+     "input": [
+      "def square(x):", 
+      "    return x * x", 
+      "print square(2)"
+     ], 
+     "language": "python", 
+     "outputs": [
+      {
+       "output_type": "stream", 
+       "stream": "stdout", 
+       "text": [
+        "4"
+       ]
+      }
+     ], 
+     "prompt_number": 16
+    }, 
+    {
+     "cell_type": "markdown", 
+     "source": [
+      "# Exercises", 
+      "1. Create a function that returns the factorial of a given number"
+     ]
+    }, 
     {
      "cell_type": "code", 
      "collapsed": true,