Lesson+1.ipynb

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    "# Lesson 1\n",
    "\n",
    "1. What is a program?\n",
    "2. Course Objectives\n",
    "3. Python:\n",
    "    + Running your first program\n",
    "  \n",
    "    +  Writing your first program\n",
    "    + Python as a calculator\n",
    "    + Variables"
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    "### What is a program?"
   ]
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    "\n",
    "<img src=\"images/windows-10-explorer.png\">\n",
    "<table>\n",
    "<tr  style='background-color:white'>\n",
    "<td><img src=\"images/calculator.png\"  style= 'display:inline;'> </td>\n",
    "<td><img src=\"images/chrome.jpg\" style= 'display:inline;'> </td>\n",
    "</tr>\n",
    "</table>"
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    "### Programming languages \n",
    "\n",
    "<table>\n",
    "<tr  style='background-color:white'>\n",
    "<td><img src=\"images/java.png\"  style= 'display:inline;'> </td>\n",
    "<td><img src=\"images/c_plus.png\" style= 'display:inline;'> </td>\n",
    "<td><img src=\"images/python.jpeg\" style= 'display:inline;'> </td>\n",
    "\n",
    "<tr>\n",
    "</table>"
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    "### Programming\n",
    "\n",
    "- Programming is just a tool\n",
    "- Problem solving skills are essential\n",
    "- Programming is used to implement Algorithms\n",
    "- An Algorithm is a step by step method to solve a problem, we use it all the time but we are not aware of it, Examples?\n"
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    "### By the end of this course\n",
    "\n",
    "1. Programming (black box -> open box)\n",
    "2. Implementing your own programs (Project/ mini projects)\n",
    "3. What you can reach using programming? and put you on the track of how to get there"
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   "source": [
    "##  Why Python?\n",
    "### Easy language + Huge Capabilities + Online Support\n",
    "\n",
    "<table>\n",
    "<tr>\n",
    "<th>Python </th>\n",
    "<th> Java </th>\n",
    "<th>C++</th>\n",
    "<th>Ruby </th>\n",
    "</tr>\n",
    "<tr  style='background-color:white'>\n",
    "<td><img src=\"images/hello_world_python_.png\" style= 'display:inline;'> </td>\n",
    "<td><img src=\"images/hello_world_java.png\"  style= 'display:inline;'> </td>\n",
    "<td><img src=\"images/hello_world_c_plus.png\" style= 'display:inline;'> </td>\n",
    "<td><img src=\"images/hello_world_ruby.png\" style= 'display:inline;'> </td>\n",
    "</tr>\n",
    "</table>\n",
    "<table>\n",
    "<tr>\n",
    "<td>\n",
    "<img src=\"images/why_python.png\" style= 'display:inline;'>\n",
    "source: https://en.wikipedia.org/wiki/Programming_languages_used_in_most_popular_websites\n",
    "</td>\n",
    "</tr>\n",
    "</table>\n",
    "\n"
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    "## Running your first python program\n",
    "\n",
    "1. Open PyCharm\n",
    "2. Open python_examples folder\n",
    "3. Run hello_world.py\n"
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    "## Writing your first program\n",
    "#### Example 1 \n",
    " - write a program that prints out your name \n",
    " - Hint: you can modify the hello_world.py file to print your name instead of hello world and rerun it"
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   "source": [
    "### Using Python Shell\n",
    "- View -> Tool Windows -> Terminal -> write 'python'\n"
   ]
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    "### Using Python as a calculator\n",
    "- Operators: \n",
    "    - +\n",
    "    - - \n",
    "    - *\n",
    "    - /\n",
    "    - // \n",
    "    - %\n",
    "- Types: int vs float\n",
    "- Precedence: \n",
    " - we can know the operations precedence by following statment \n",
    "        (Please Excuse My Dear Aunt Sally) \n",
    "        P: Parentheses ()\n",
    "        E: Exponents **\n",
    "        M: Multiplcation *\n",
    "        D: Division /\n",
    "        A: Addition +\n",
    "        S: Subtraction -"
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    "### Errors\n",
    "- Syntax Errors\n",
    "<img src=\"images/syntax_error.png\" >\n",
    "- Semantic Errors\n",
    "<img src=\"images/semantic_error.png\">\n"
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    "### Variables\n",
    "- For now anything we calculated is just printed\n",
    "- How to remember a value of an expression?\n",
    "- Similar to variables in math\n",
    "<img src=\"images/variables.png\">\n",
    "<img src=\"images/variables_named.png\">\n"
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    "#### Example 2:\n",
    "You are in a country X and travelling to Germany next week. You have 100 dollars and you want to convert them to euros. You go to a currency exchange center and they tell you that they cannot convert it directly. They have to first convert the 100 dollars to currency X, and then convert it from currency X to euros. How many euros will you have in the end?\n",
    "\n",
    "\n",
    "- Exchange rate from dollars to currency X is 15\n",
    "\n",
    "- Exchange rate from currency X to euros is 0.05\n",
    "\n",
    "- Exchange rate from dollars to euros is 0.8\n",
    "\n"
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