Add initial version of chapter 03's summary

03_conditionals/03_summary.ipynb

@@ -0,0 +1,76 @@
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+    "# Chapter 3: Conditionals & Exceptions (TL;DR)"
+   ]
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+    "- **boolean expressions** evaluate to either `True` or `False`\n",
+    "- **relational operators** (e.g., `==` or `!=`) compare operands according to \"human\" interpretations\n",
+    "- **logical operators** (e.g., `and` )combine boolean sub-expressions to more \"complex\" expressions\n",
+    "- the **conditional statement** (i.e., the `if` statement) allows **controlling** the **flow of execution** depending on some **conditions**\n",
+    "- a **conditional expression** is a short form of a conditional statement\n",
+    "- **exception handling** is also a common way of **controlling** the **flow of execution**, in particular, if we have to be prepared for bad input data"
+   ]
+  }
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README.md

@@ -85,6 +85,7 @@ Alternatively, the content can be viewed in a web browser
     - [exercises <img height="12" style="display: inline-block" src="static/link/to_nb.png">](https://nbviewer.jupyter.org/github/webartifex/intro-to-python/blob/develop/03_conditionals/02_exercises.ipynb)
       [<img height="12" style="display: inline-block" src="static/link/to_mb.png">](https://mybinder.org/v2/gh/webartifex/intro-to-python/develop?urlpath=lab/tree/03_conditionals/02_exercises.ipynb)
       (Fizz Buzz)
+    - [summary <img height="12" style="display: inline-block" src="static/link/to_nb.png">](https://nbviewer.jupyter.org/github/webartifex/intro-to-python/blob/develop/03_conditionals/03_summary.ipynb)
 
 
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