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lesson -4
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‎Lesson-4.ipynb

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{
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"cells": [
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{
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"cell_type": "markdown",
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"id": "bdc4946b-43bb-4bf3-aff0-4473917363ae",
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"metadata": {},
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"source": [
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"Python Errors\n",
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"Python errors are messages that Python gives you when something goes wrong in your code.\n",
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"\n",
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"SyntaxError: This happens when you have a typo or incorrect syntax."
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "b38b4a9f-3fe2-4a49-b847-f672ef1dc007",
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"metadata": {},
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"outputs": [],
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"source": [
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"print(\"Hello world"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "6f223503-048d-4567-b0ef-a9280921ff65",
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"metadata": {},
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"outputs": [],
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"source": [
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"SyntaxError: EOL while scanning string literal"
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]
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},
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{
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"cell_type": "markdown",
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"id": "b4691206-dac4-479d-8246-970988b794e6",
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"metadata": {},
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"source": [
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"IndentationError: This happens when the indentation (spaces or tabs) is incorrect."
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "11a02d7b-164e-4345-8c1d-df2103ef4127",
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"metadata": {},
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"outputs": [],
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"source": [
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"if True:\n",
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"print(\"Hello\")"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "0ae94598-3ed4-48cb-ab81-32bc908b2fd9",
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"metadata": {},
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"outputs": [],
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"source": [
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"IndentationError: expected an indented block"
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]
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},
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{
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"cell_type": "markdown",
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"id": "11d6d922-27be-4b28-aa32-741ef5319290",
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"metadata": {},
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"source": [
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"NameError: This happens when you try to use a variable that hasn’t been defined."
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "a75c5de6-eace-4c32-85a2-2b9139b84062",
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"metadata": {},
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"outputs": [],
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"source": [
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"print(x)"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "0cabcdce-064d-4f5e-9264-87c02861afbf",
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"metadata": {},
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"outputs": [],
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"source": [
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"NameError: name 'x' is not defined"
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]
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},
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{
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"cell_type": "markdown",
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"id": "703f383c-186f-47a0-821e-8b1562732a61",
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"metadata": {},
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"source": [
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"TypeError: This happens when an operation is applied to an object of inappropriate type."
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "6cf01916-c907-4246-a64b-9dcdaa865ba0",
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"metadata": {},
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"outputs": [],
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"source": [
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"print(\"Hello\" + 5)"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "9e5ea9ed-7d2b-4623-89c7-4eaafec40e27",
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"metadata": {},
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"outputs": [],
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"source": [
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"TypeError: can only concatenate str (not \"int\") to str"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "6d6b6fae-b34d-4c1b-baea-c6baf6b36431",
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"metadata": {},
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"outputs": [],
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"source": [
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"print(\"Hello\" + str(5))"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "39125771-d296-4221-9da1-0f44c18ad35d",
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"metadata": {},
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"outputs": [],
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"source": [
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"Hello5"
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]
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},
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{
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"cell_type": "markdown",
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"id": "b5073df7-02be-4188-b059-fa4ea0febfa6",
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"metadata": {},
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"source": [
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"Keywords: not, and, or\n",
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"These keywords are used to combine conditional statements.\n",
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"\n",
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"not: Inverts the boolean value."
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]
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},
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{
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"cell_type": "markdown",
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"id": "241c326f-b284-4209-9b4f-3daab1866845",
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"metadata": {},
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"source": [
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"<img src= \"python-logical-operators.webp\">"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "80ab6628-bb93-4e43-89f9-a417837bcf1d",
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"metadata": {},
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"outputs": [],
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"source": [
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"door_locked = False\n",
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"if not door_locked:\n",
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" print(\"You can enter.\")"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "0c0364f6-9657-4ee5-a05b-1d1da03ec914",
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"metadata": {},
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"outputs": [],
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"source": [
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"#OUTPUT\n",
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"You can enter."
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]
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},
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{
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"cell_type": "markdown",
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"id": "395e7131-686c-4400-a2b7-38b7873349c8",
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"metadata": {},
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"source": [
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"and: Both conditions must be true.\n",
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"\n",
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"Example: Checking if you have a ticket and it's a weekday\n",
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"python\n"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "d9ea428d-c587-4522-be66-9e9f75710f53",
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"metadata": {},
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"outputs": [],
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"source": [
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"has_ticket = True\n",
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"is_weekday = True\n",
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"if has_ticket and is_weekday:\n",
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" print(\"You can go to work.\")"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "f861a29f-562b-45ca-a74e-9314b49ec01c",
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"metadata": {},
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"outputs": [],
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"source": [
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"#OUTPUT\n",
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"You can go to work."
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]
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},
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{
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"cell_type": "markdown",
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"id": "0eaebb7e-fc24-405e-bbc1-6b031e4af940",
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"metadata": {},
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"source": [
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"or: At least one condition must be true.\n",
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"Example: Checking if it’s sunny or you have an umbrella"
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]
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},
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{
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"cell_type": "markdown",
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"id": "ee9a9d72-c6aa-4b1b-9912-70b9613b401f",
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"metadata": {},
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"source": [
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"is_sunny = False\n",
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"has_umbrella = True\n",
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"if is_sunny or has_umbrella:\n",
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" print(\"You can go outside.\")"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "70f54597-562e-4d91-a417-411ef1a5e4a3",
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"metadata": {},
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"outputs": [],
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"source": [
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"#OUTPUT\n",
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"You can go outside."
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]
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}
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],
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"metadata": {
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"kernelspec": {
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"display_name": "Python 3 (ipykernel)",
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"language": "python",
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"name": "python3"
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},
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"language_info": {
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"codemirror_mode": {
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"name": "ipython",
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"version": 3
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},
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"file_extension": ".py",
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"mimetype": "text/x-python",
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"name": "python",
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"nbconvert_exporter": "python",
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"pygments_lexer": "ipython3",
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"version": "3.12.4"
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}
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},
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"nbformat": 4,
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"nbformat_minor": 5
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}

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