lesson49_stringindex.ipynb

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      "cell_type": "markdown",
      "source": [
        "Lesson 49 is on String Indexing"
      ],
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          "text": [
            "H\n"
          ]
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      ],
      "source": [
        "# suppose we want to access an individual character from\n",
        "# a given string\n",
        "my_str = \"Hello\"\n",
        "print(my_str[0])"
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "# python is zero-based index\n",
        "my_str = \"Hello\"\n",
        "print(my_str[0])\n",
        "print(my_str[1])\n",
        "print(my_str[2])\n",
        "print(my_str[3])\n",
        "print(my_str[4])"
      ],
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          "text": [
            "H\n",
            "e\n",
            "l\n",
            "l\n",
            "o\n"
          ]
        }
      ]
    },
    {
      "cell_type": "code",
      "source": [
        "shay = \"SHAY\"\n",
        "def prn_first_char(word: str) -> None:\n",
        "  print(word[0])\n",
        "\n",
        "prn_first_char(shay)"
      ],
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          "text": [
            "S\n"
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    {
      "cell_type": "code",
      "source": [
        "shay = \"SHAY\"\n",
        "def prn_sec_char(word: str) -> None:\n",
        "  print(word[1])\n",
        "\n",
        "prn_sec_char(shay)"
      ],
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            "H\n"
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      "cell_type": "code",
      "source": [
        "# what if we want to print the last character of something?\n",
        "\n",
        "def last_char(word: str) -> None:\n",
        "  word_len = len(word) - 1\n",
        "  print(word[word_len])\n",
        "\n",
        "last_char(\"HEOF\")\n",
        "\n",
        "# remember if we had a string of length 5\n",
        "# the last character is going to be at index 4"
      ],
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          "text": [
            "F\n"
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