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   "source": [
    "# CSE 160: Worksheet 1 - Loops & Range - Solutions\n",
    "\n",
    "Please try to answer the following questions without running any code initially.\n",
    "\n",
    "***"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "**Problem 1**\n",
    "\n",
    "How many times will the following loops iterate?\n",
    "\n",
    "```\n",
    "for i in range(7):\n",
    " <loop body>\n",
    " \n",
    "for i in [1,2,3,4,5]:\n",
    " <loop body>\n",
    " \n",
    "for i in range(0,4):\n",
    " <loop body>\n",
    "  \n",
    "for i in range(5, 1, -1):\n",
    " <loop body>\n",
    "```\n",
    "\n",
    "***"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 23,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "7\n",
      "5\n",
      "4\n",
      "4\n"
     ]
    }
   ],
   "source": [
    "n = 0\n",
    "for i in range(7):\n",
    "    n=n+1\n",
    "print(n)\n",
    "\n",
    "#--------------------\n",
    "n = 0\n",
    "for i in [1,2,3,4,5]:\n",
    "    n=n+1\n",
    "print(n)\n",
    "\n",
    "#--------------------\n",
    "n = 0\n",
    "for i in range(0,4):\n",
    "    n=n+1\n",
    "print(n)\n",
    "\n",
    "#--------------------\n",
    "n = 0\n",
    "for i in range(5, 1, -1):\n",
    "    n=n+1\n",
    "print(n)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "**Problem 2**\n",
    "\n",
    "What is the expected code for the following loops?\n",
    "\n",
    "```\n",
    "for letter in \"data is fun\":\n",
    "  print(letter + \"~\", end=\"\")       # end=\"\" suppresses the automatic new line\n",
    "```\n",
    "    "
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "d~a~t~a~ ~i~s~ ~f~u~n~"
     ]
    }
   ],
   "source": [
    "for letter in \"data is fun\":\n",
    "  print(letter + \"~\", end=\"\") "
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 22,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "0 1 2 \n",
      "5 7 9 11 13 \n",
      "10 9 8 7 6 5 4 3 2 \n"
     ]
    }
   ],
   "source": [
    "for i in range(3):\n",
    " print(i, end=\" \")\n",
    "print()\n",
    "    \n",
    "#--------------------\n",
    "for j in range(5,15,2):\n",
    " print(j, end=\" \")\n",
    "print()\n",
    "    \n",
    "#--------------------\n",
    "for k in range(10,1,-1):\n",
    " print(k, end=\" \")\n",
    "print()"
   ]
  }
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