Lesson-4.ipynb

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    "Python Errors\n",
    "Python errors are messages that Python gives you when something goes wrong in your code.\n",
    "\n",
    "SyntaxError: This happens when you have a typo or incorrect syntax."
   ]
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   "source": [
    "print(\"Hello world"
   ]
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    "SyntaxError: EOL while scanning string literal"
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    "IndentationError: This happens when the indentation (spaces or tabs) is incorrect."
   ]
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    "if True:\n",
    "print(\"Hello\")"
   ]
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    "IndentationError: expected an indented block"
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    "NameError: This happens when you try to use a variable that hasn’t been defined."
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    "print(x)"
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    "NameError: name 'x' is not defined"
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    "TypeError: This happens when an operation is applied to an object of inappropriate type."
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   "source": [
    "print(\"Hello\" + 5)"
   ]
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   "source": [
    "TypeError: can only concatenate str (not \"int\") to str"
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   "source": [
    "print(\"Hello\" + str(5))"
   ]
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   "source": [
    "Hello5"
   ]
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   "source": [
    "Keywords: not, and, or\n",
    "These keywords are used to combine conditional statements.\n",
    "\n",
    "not: Inverts the boolean value."
   ]
  },
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   "source": [
    "<img src= \"python-logical-operators.webp\">"
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    "door_locked = False\n",
    "if not door_locked:\n",
    "    print(\"You can enter.\")"
   ]
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   "source": [
    "#OUTPUT\n",
    "You can enter."
   ]
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    "and: Both conditions must be true.\n",
    "\n",
    "Example: Checking if you have a ticket and it's a weekday\n",
    "python\n"
   ]
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    "has_ticket = True\n",
    "is_weekday = True\n",
    "if has_ticket and is_weekday:\n",
    "    print(\"You can go to work.\")"
   ]
  },
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   "source": [
    "#OUTPUT\n",
    "You can go to work."
   ]
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    "or: At least one condition must be true.\n",
    "Example: Checking if it’s sunny or you have an umbrella"
   ]
  },
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   "source": [
    "is_sunny = False\n",
    "has_umbrella = True\n",
    "if is_sunny or has_umbrella:\n",
    "    print(\"You can go outside.\")"
   ]
  },
  {
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   "outputs": [],
   "source": [
    "#OUTPUT\n",
    "You can go outside."
   ]
  }
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