Variable.ipynb

{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Variable & Typecast"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {},
   "outputs": [
    {
     "ename": "SyntaxError",
     "evalue": "invalid syntax (<ipython-input-1-0e4b6917a14b>, line 2)",
     "output_type": "error",
     "traceback": [
      "\u001b[1;36m  File \u001b[1;32m\"<ipython-input-1-0e4b6917a14b>\"\u001b[1;36m, line \u001b[1;32m2\u001b[0m\n\u001b[1;33m    2name_of_var = 2\u001b[0m\n\u001b[1;37m               ^\u001b[0m\n\u001b[1;31mSyntaxError\u001b[0m\u001b[1;31m:\u001b[0m invalid syntax\n"
     ]
    }
   ],
   "source": [
    "# Can not start with number or special characters\n",
    "2name_of_var = 2"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {},
   "outputs": [],
   "source": [
    "x = 2\n",
    "y = 3"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {},
   "outputs": [],
   "source": [
    "z = x + y"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "5\n"
     ]
    }
   ],
   "source": [
    "print(z)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 7,
   "metadata": {},
   "outputs": [],
   "source": [
    "x = 'hello'"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 9,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "hello\n"
     ]
    }
   ],
   "source": [
    "x\n",
    "print(x)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 10,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "<class 'int'>\n"
     ]
    }
   ],
   "source": [
    "x=10\n",
    "type(x)\n",
    "print(type(x))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 11,
   "metadata": {},
   "outputs": [],
   "source": [
    "num = 12\n",
    "name = 'Sam'"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 12,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "100\n"
     ]
    },
    {
     "data": {
      "text/plain": [
       "int"
      ]
     },
     "execution_count": 12,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "a=100 \n",
    "print (a)\n",
    "type(a)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 13,
   "metadata": {},
   "outputs": [],
   "source": [
    "#Text Type:\tstr\n",
    "#Numeric Types:\tint, float, complex\n",
    "#Sequence Types:\tlist, tuple, range\n",
    "#Mapping Type:\tdict\n",
    "#Set Types:\tset, frozenset\n",
    "#Boolean Type:\tbool"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 14,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "<class 'float'>\n",
      "<class 'float'>\n",
      "<class 'complex'>\n"
     ]
    }
   ],
   "source": [
    "x = 1.1  # int\n",
    "y = 2.8  # float\n",
    "z = 1j   # complex\n",
    "print(type(x))\n",
    "print(type(y))\n",
    "print(type(z))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 15,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "<class 'float'>\n",
      "<class 'int'>\n",
      "<class 'int'>\n"
     ]
    }
   ],
   "source": [
    "x = 1.0\n",
    "y = 3565622255488735656222554887711711\n",
    "z = -3255522\n",
    "\n",
    "print(type(x))\n",
    "print(type(y))\n",
    "print(type(z))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 16,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "2\n"
     ]
    }
   ],
   "source": [
    "import random\n",
    "\n",
    "print(random.randrange(1,10))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 17,
   "metadata": {
    "collapsed": true,
    "jupyter": {
     "outputs_hidden": true
    }
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "<class 'int'>\n",
      "<class 'int'>\n",
      "<class 'int'>\n",
      "3\n"
     ]
    }
   ],
   "source": [
    "x = int(1)   # x will be 1\n",
    "y = int(2.8) # y will be 2\n",
    "z = int(\"3\") # z will be 3\n",
    "\n",
    "print(type(x))\n",
    "print(type(y))\n",
    "print(type(z))\n",
    "print(z)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 19,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "SoumyadipHello\n"
     ]
    },
    {
     "data": {
      "text/plain": [
       "str"
      ]
     },
     "execution_count": 19,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "a=str(\"Soumyadip\")+\"Hello\"\n",
    "print (a)\n",
    "type(a)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 22,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "My number is: 12, and my name is: Sam\n"
     ]
    }
   ],
   "source": [
    "print('My number is: {}, and my name is: {}'.format(num,name))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 23,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "0\n",
      "<class 'int'>\n",
      "soumyadip\n",
      "<class 'str'>\n"
     ]
    }
   ],
   "source": [
    "# Declare a variable and initialize it\n",
    "f = 0\n",
    "print(f)\n",
    "print(type(f))\n",
    "# re-declaring the variable works\n",
    "f = 'soumyadip'\n",
    "print(f)\n",
    "print(type(f))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 24,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Soumyadip99\n"
     ]
    }
   ],
   "source": [
    "a=\"Soumyadip\"\n",
    "b = str(99)\n",
    "print(a+(((b))))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 25,
   "metadata": {},
   "outputs": [],
   "source": [
    "#Legal variable names:\n",
    "myvar = \"John\"\n",
    "my_var = \"John\"\n",
    "_my_var = \"John\"\n",
    "myVar = \"John\"\n",
    "MYVAR = \"John\"\n",
    "myvar2 = \"John\""
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 26,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Orange\n",
      "Banana\n",
      "Cherry\n",
      "('Orange', 'Banana', 'Cherry')\n"
     ]
    }
   ],
   "source": [
    "p=x, y, z = \"Orange\", \"Banana\", \"Cherry\"\n",
    "print(x)\n",
    "print(y)\n",
    "print(z)\n",
    "print(p)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 27,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Python is awesome\n"
     ]
    }
   ],
   "source": [
    "x = \"Python is \"\n",
    "y = \"awesome\"\n",
    "z =  x + y\n",
    "print(z)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 28,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Orange\n",
      "Orange\n",
      "Orange\n"
     ]
    }
   ],
   "source": [
    "x = y = z = \"Orange\"\n",
    "print(x)\n",
    "print(y)\n",
    "print(z)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 29,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Python is awesome\n"
     ]
    }
   ],
   "source": [
    "x = \"awesome\"\n",
    "print(\"Python is \" + x)"
   ]
  }
 ],
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