01.Variables and Printing.ipynb

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   "source": [
    "# Getting started\n",
    "Topics:\n",
    "\n",
    "    1.How to print\n",
    "    2.How to assign variables\n",
    "    3.How to comment\n",
    "    4.Syntax for basic math\n",
    "## How to print\n",
    "In Julia we usually use println() to print"
   ]
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     "text": [
      "I'm excited to learn Julia!\n"
     ]
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   "source": [
    "println(\"I'm excited to learn Julia!\")"
   ]
  },
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   "cell_type": "markdown",
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   "source": [
    "If you're new to jupyter notebooks, note that the last line of a cell prints when you execute that cell"
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   "cell_type": "code",
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   "outputs": [
    {
     "data": {
      "text/plain": [
       "456"
      ]
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   "source": [
    "123\n",
    "456"
   ]
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   "source": [
    "# How to assign variables\n",
    "All we need is a variable name,value,and an equal's sign!\n",
    "\n",
    "Julia will figure out types for us."
   ]
  },
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   "cell_type": "code",
   "execution_count": 4,
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      "my_answer = 42\n"
     ]
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   "source": [
    "my_answer = 42;\n",
    "@show my_answer;"
   ]
  },
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   "source": [
    "my_answer = 42\n",
    "# my_answer = Int32(42)\n",
    "typeof(my_answer)"
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   "cell_type": "code",
   "execution_count": 27,
   "metadata": {},
   "outputs": [
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     "data": {
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       "Float64"
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     "execution_count": 27,
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   ],
   "source": [
    "my_pi = 3.14159\n",
    "typeof(my_pi)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 28,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "String"
      ]
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     "execution_count": 28,
     "metadata": {},
     "output_type": "execute_result"
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   ],
   "source": [
    "my_name = \"Liu Tong\"\n",
    "typeof(my_name)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "After assigning a value to a variable, we can reassign a value of a different type to that\n",
    "    \n",
    "variable without any issue."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "my_answer = my_name"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "typeof(my_answer)"
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   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# How to comment"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# You can leave comments on a single line using the pound/hash key"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "#= \n",
    "\n",
    "For multi-line comments,\n",
    "use the ‘#= =#’sequence.\n",
    "\n",
    "=#"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Syntax for basic math"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "scrolled": true
   },
   "outputs": [],
   "source": [
    "sum = 3 + 7"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "difference = 10 - 3"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "product = 20 * 5"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "quotient = 100 / 10"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "power = 10 ^ 2"
   ]
  },
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   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": []
  }
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