Untitled3.ipynb

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   "source": "###nus begin section"
  },
  {
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   "cell_type": "markdown",
   "source": "## Python Math Basics"
  },
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   "metadata": {
    "autograde_tag": "square",
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   "source": "###nus autograde_id square_integer\n###nus assignment_name Square an Integer\ndef square(x):\n    \"\"\"Returns the square of an integer x.\"\"\"\n    ###nus begin solution\n    return -1\n    ###nus end solution",
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   "outputs": []
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   "source": "###nus autograde_id even_integer\n###nus assignment_name Return Evenness of an Integer\ndef even(x):\n    \"\"\"Returns true if the integer x is even and false otherwise.\"\"\"\n    ###nus begin solution\n    return (x % 2)\n    ###nus end solution",
   "execution_count": null,
   "outputs": []
  },
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   "source": "###nus end section"
  },
  {
   "metadata": {},
   "cell_type": "raw",
   "source": "###nus begin section"
  },
  {
   "metadata": {},
   "cell_type": "markdown",
   "source": "## Python String Basics"
  },
  {
   "metadata": {
    "autograde_tag": "square",
    "trusted": false,
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   "cell_type": "code",
   "source": "###nus autograde_id substring\n###nus assignment_name Substring\ndef substr(s, a, b):\n    \"\"\"Returns the subsection of a string from letters a through b.\n    Ex. substr(\"hello world\", 1, 5) returns \"ello\".\"\"\"\n    ###nus begin solution\n    return s[a:b]\n    ###nus end solution",
   "execution_count": 1,
   "outputs": []
  },
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   "cell_type": "raw",
   "source": "###nus end section"
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