{"id":1034,"date":"2020-10-18T18:59:39","date_gmt":"2020-10-18T18:59:39","guid":{"rendered":"https:\/\/www.lzych.pl\/?p=1034"},"modified":"2022-01-27T22:17:17","modified_gmt":"2022-01-27T21:17:17","slug":"python-tutorial-free-course-for-beginners-5-loops","status":"publish","type":"post","link":"https:\/\/www.lzych.pl\/en\/python-tutorial-free-course-for-beginners-5-loops\/","title":{"rendered":"Python &#8211; bezp\u0142atny kurs dla pocz\u0105tkuj\u0105cych #5, P\u0119tle"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"1034\" class=\"elementor elementor-1034\" data-elementor-settings=\"[]\">\n\t\t\t\t\t\t<div class=\"elementor-inner\">\n\t\t\t\t\t\t\t<div class=\"elementor-section-wrap\">\n\t\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-d89e358 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"d89e358\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t\t\t<div class=\"elementor-row\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-bd5bd3b\" data-id=\"bd5bd3b\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-column-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-a18f3ba elementor-widget elementor-widget-text-editor\" data-id=\"a18f3ba\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-text-editor elementor-clearfix\">\n\t\t\t\tDzisiaj poznamy kolejny super wa\u017cny element, kt\u00f3ry wykorzystywany jest praktycznie ca\u0142y czas w codziennej pracy programisty &#8211; p\u0119tle.\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-a6ec265 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"a6ec265\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t\t\t<div class=\"elementor-row\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-b4be853\" data-id=\"b4be853\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-column-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-f2cde52 elementor-widget elementor-widget-heading\" data-id=\"f2cde52\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Czym s\u0105 P\u0119tle?<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b149e5c elementor-widget elementor-widget-text-editor\" data-id=\"b149e5c\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-text-editor elementor-clearfix\">\n\t\t\t\t<p><span style=\"font-family: var e-global-typography-text-font-family, Sans-serif;\">Wielokrotnie zdarza si\u0119, \u017ce tworz\u0105c jaki\u015b program, chcemy aby jaka\u015b cz\u0119\u015b\u0107 zawartego w nim kodu wykona\u0142a si\u0119 co najmniej kilka razy, na przyk\u0142ad:<\/span><\/p><ul><li><span style=\"font-family: 'var e-global-typography-text-font-family', sans-serif;\">kiedy na poprzednich lekcjach tworzyli\u015bmy nasz kalkulator, dobrze by\u0142oby, aby program nie ko\u0144czy\u0142 si\u0119 po jednym przeliczeniu tylko dalej dzia\u0142a\u0142 i pyta\u0142 co chcemy wykona\u0107;<\/span><\/li><li>za\u0142\u00f3\u017cmy, \u017ce tworzymy gr\u0119 w kt\u00f3rej jedna z postaci codziennie o 9.00 rano budzi si\u0119 i je \u015bniadanie;<\/li><li>mamy 100 r\u00f3\u017cnych liczb i chcemy je wszystkie razem do siebie doda\u0107;<\/li><li>zajmujemy si\u0119 bezpiecze\u0144stwem, mamy list\u0119 10 000 najcz\u0119\u015bciej u\u017cywanych hase\u0142 w Internecie i chcemy sprawdzi\u0107, czy komputer albo aplikacja, kt\u00f3r\u0105 si\u0119 zajmujemy, akurat kt\u00f3rego\u015b z tych hase\u0142 nie u\u017cywa \ud83d\ude09<\/li><\/ul>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-2b4de27\" data-id=\"2b4de27\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-column-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-426a91d elementor-widget elementor-widget-html\" data-id=\"426a91d\" data-element_type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<div style=\"width:100%;height:0;padding-bottom:100%;position:relative;\"><iframe loading=\"lazy\" src=\"https:\/\/giphy.com\/embed\/USV0ym3bVWQJJmNu3N\" width=\"100%\" height=\"100%\" style=\"position:absolute\" frameborder=\"0\" class=\"giphy-embed\" allowfullscreen><\/iframe><\/div><p><a href=\"https:\/\/giphy.com\/gifs\/smu-ellipsis-smuellipsis-USV0ym3bVWQJJmNu3N\">via GIPHY<\/a><\/p>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-45e503d elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"45e503d\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t\t\t<div class=\"elementor-row\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-9846f35\" data-id=\"9846f35\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-column-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-79193d9 elementor-widget elementor-widget-text-editor\" data-id=\"79193d9\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-text-editor elementor-clearfix\">\n\t\t\t\t<p>Czyli, <strong>p\u0119tle s\u0142u\u017c\u0105 nam do wielokrotnego uruchomienia kodu, kt\u00f3ry znajduje si\u0119 wewn\u0105trz<\/strong>. P\u0119tle wykonuj\u0105 si\u0119 okre\u015blon\u0105 ilo\u015b\u0107 razy &#8211; mo\u017cemy okre\u015bli\u0107 t\u0119 ilo\u015b\u0107 lub stworzy\u0107 warunek (poprzednia lekcja). Mo\u017cemy te\u017c stworzy\u0107 p\u0119tl\u0119, kt\u00f3ra nigdy si\u0119 nie sko\u0144czy, chocia\u017c z najcz\u0119\u015bciej jest to b\u0142\u0105d programisty, kt\u00f3ry mo\u017ce co najmniej zawiesi\u0107 nasz program.<\/p><p><span style=\"font-family: var e-global-typography-text-font-family, Sans-serif;\">Nawi\u0105zuj\u0105c do przyk\u0142adu wy\u017cej, zamiast 10 000 wpisywa\u0107 r\u0119cznie r\u00f3\u017cne has\u0142a, albo pisa\u0107 10 000 linii kodu, kt\u00f3ra robi to samo, mo\u017cemy sobie stworzy\u0107 p\u0119tl\u0119 i w niej powt\u00f3rzy\u0107 wybran\u0105 czynno\u015b\u0107.<\/span><\/p>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-dba13f9 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"dba13f9\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t\t\t<div class=\"elementor-row\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-68a143a\" data-id=\"68a143a\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-column-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-81b96ff elementor-widget elementor-widget-heading\" data-id=\"81b96ff\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Funkcja range()<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-5e484e7 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"5e484e7\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t\t\t<div class=\"elementor-row\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-117be30\" data-id=\"117be30\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-column-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-8f3f9c6 elementor-widget elementor-widget-text-editor\" data-id=\"8f3f9c6\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-text-editor elementor-clearfix\">\n\t\t\t\t<p><span style=\"font-family: var e-global-typography-text-font-family, Sans-serif;\">O tym, czym s\u0105 dok\u0142adnie funkcje powiemy dok\u0142adniej na kolejnej lekcji. Obecnie to co jest istotne, to okre\u015blenie ile razy p\u0119tla ma si\u0119 wykona\u0107. Pomo\u017ce nam w tym w\u0142a\u015bnie\u00a0<\/span><span style=\"font-family: var e-global-typography-text-font-family, Sans-serif;\"><strong>funkcja range()<\/strong><\/span><span style=\"font-family: var e-global-typography-text-font-family, Sans-serif;\">\u00a0&#8211; w nawiasie jako argument wpisujemy wybran\u0105 liczb\u0119, a w odpowiedzi otrzymamy tyle liczb ile podali\u015bmy w argumencie (zaczynaj\u0105c od 0). Pozwoli nam to powiedzie\u0107 p\u0119tli ile razy ma si\u0119 wykona\u0107.<\/span><\/p><p><span style=\"font-family: var e-global-typography-text-font-family, Sans-serif;\">Przyk\u0142ad jak to dzia\u0142a obok.<\/span><\/p>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-1c7a5ca\" data-id=\"1c7a5ca\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-column-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-0dc2e8c elementor-widget elementor-widget-text-editor\" data-id=\"0dc2e8c\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-text-editor elementor-clearfix\">\n\t\t\t\t<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\"># just an example\n\nrange(4)\n# it generates 4 numbers starting from 0:\n# 0, 1, 2, 3\n\nrange(8)\n# it generates 8 numbers\n# 0, 1, 2, 3, 4, 5, 6, 7\n<\/pre>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-334e13e elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"334e13e\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t\t\t<div class=\"elementor-row\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-fe87c47\" data-id=\"fe87c47\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-column-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-48a4062 elementor-widget elementor-widget-heading\" data-id=\"48a4062\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">P\u0119tla \"for in\"<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-715d4a2 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"715d4a2\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t\t\t<div class=\"elementor-row\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-dbfa239\" data-id=\"dbfa239\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-column-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-aa5c3f4 elementor-widget elementor-widget-text-editor\" data-id=\"aa5c3f4\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-text-editor elementor-clearfix\">\n\t\t\t\t<p><span style=\"font-family: var e-global-typography-text-font-family, Sans-serif;\">Pierwsz\u0105 p\u0119tl\u0105, kt\u00f3r\u0105 poznamy jest tak zwana p\u0119tla &#8222;for in&#8221;. Pozwala nam ona \u0142atwo wielokrotnie wykona\u0107 kod. Co wi\u0119cej daje nam dost\u0119p do ka\u017cdego z element\u00f3w w danej strukturze (dok\u0142adniej o strukturach powiemy sobie na kolejnych lekcjach).<\/span><\/p><p><span style=\"font-family: var e-global-typography-text-font-family, Sans-serif;\">Mo\u017cemy przy niej wykorzysta\u0107 wy\u017cej wymienion\u0105 funkcj\u0119 range(), kt\u00f3ra okre\u015bli nam ile razy kod ma si\u0119 wykona\u0107.<\/span><\/p><p><span style=\"font-family: var e-global-typography-text-font-family, Sans-serif;\">Pami\u0119taj, \u017ce bardzo wa\u017cny jest prawid\u0142owy zapis p\u0119tli \u2013 lini\u0119 zawsze nale\u017cy zako\u0144czy\u0107 znakiem dwukropka \u201c:\u201d, a kod, kt\u00f3ry znajduje si\u0119 w p\u0119tli musi by\u0107 poprzedzony tabulatorem. Linie niepoprzedzone wci\u0119ciem nie b\u0119d\u0105 nale\u017ce\u0107 do tej p\u0119tli, dlatego chc\u0105c wyj\u015b\u0107 z p\u0119tli nale\u017cy przej\u015b\u0107 do nowej linii i rozpocz\u0105\u0107 pisanie kodu bez wci\u0119cia.<\/span><\/p><p><span style=\"font-family: var e-global-typography-text-font-family, Sans-serif;\">Oto jak zadzia\u0142a nasza p\u0119tla:<\/span><\/p>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-85b6ff9 elementor-widget elementor-widget-image\" data-id=\"85b6ff9\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-image\">\n\t\t\t\t\t\t\t\t\t\t\t\t<img width=\"290\" height=\"164\" src=\"https:\/\/www.lzych.pl\/wp-content\/uploads\/2020\/10\/loop.png\" class=\"attachment-large size-large\" alt=\"\" loading=\"lazy\" srcset=\"https:\/\/www.lzych.pl\/wp-content\/uploads\/2020\/10\/loop.png 290w, https:\/\/www.lzych.pl\/wp-content\/uploads\/2020\/10\/loop-16x9.png 16w\" sizes=\"(max-width: 290px) 100vw, 290px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-0cde174\" data-id=\"0cde174\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-column-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-eec7f69 elementor-widget elementor-widget-text-editor\" data-id=\"eec7f69\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-text-editor elementor-clearfix\">\n\t\t\t\t<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\"># range(4) will generate: 0, 1, 2, 3\nfor number in range(4):\n    print(number)\n\n# result:\n# 0\n# 1\n# 2\n# 3\n<\/pre>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ec71ad4 elementor-widget elementor-widget-text-editor\" data-id=\"ec71ad4\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-text-editor elementor-clearfix\">\n\t\t\t\t<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\">print('before loop')\n\nfor number in range(4):\n    print('hello!')\n\nprint('after loop')\n\n# result:\n# before loop\n# hello!\n# hello!\n# hello!\n# hello!\n# after loop\n<\/pre>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-985b773 elementor-widget elementor-widget-text-editor\" data-id=\"985b773\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-text-editor elementor-clearfix\">\n\t\t\t\t<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\"># we can also stop the loop manually\n# using conditional statement and command: \"break\"\n\n# example boolean variable that we will use as a condition\nsuccess = True\n\nfor i in range(10):\n    print('code inside loop')\n    if success:\n        print('stop the loop')\n        # it stops the loop manually\n        break\nelse:\n    print('it will be executed only')\n    print('if there will be no brake in loop')\n\n# result:\n# code inside loop\n# stop the loop\n<\/pre>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-152774e elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"152774e\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t\t\t<div class=\"elementor-row\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-f001ef6\" data-id=\"f001ef6\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-column-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-8ab7698 elementor-widget elementor-widget-heading\" data-id=\"8ab7698\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">P\u0119tla \"while\"<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-53f5020 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"53f5020\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t\t\t<div class=\"elementor-row\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-af9e24a\" data-id=\"af9e24a\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-column-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-04d4a73 elementor-widget elementor-widget-text-editor\" data-id=\"04d4a73\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-text-editor elementor-clearfix\">\n\t\t\t\t<p><span style=\"font-family: var e-global-typography-text-font-family, Sans-serif;\">Innym rodzajem p\u0119tli, z kt\u00f3rej mo\u017cemy skorzysta\u0107, jest p\u0119tla while. B\u0119dzie ona wykonywa\u0142a si\u0119 tak d\u0142ugo, jak jest spe\u0142niany warunek.<\/span><\/p>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-4d91f16\" data-id=\"4d91f16\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-column-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-fd59522 elementor-widget elementor-widget-text-editor\" data-id=\"fd59522\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-text-editor elementor-clearfix\">\n\t\t\t\t<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\">myNumber = 1\n\n# as long as variable called myNumber is less than 5\n# we execute this loop\nwhile myNumber &lt; 5:\n    print(myNumber)\n    # += means that we add number after that statement\n    # to the current value, for example:\n    # a) 1 += 1 it gives 2\n    # b) 6 += 2 it gives 8\n    # we use it to increase the value of the variable\n    myNumber += 1\n\n# result:\n# 1\n# 2\n# 3\n# 4<\/pre>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-5abf062 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"5abf062\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t\t\t<div class=\"elementor-row\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-09539c8\" data-id=\"09539c8\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-column-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-5393859 elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"5393859\" data-element_type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-3bf68a0 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"3bf68a0\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t\t\t<div class=\"elementor-row\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-ed5e750\" data-id=\"ed5e750\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-column-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-6c9ec21 elementor-widget elementor-widget-text-editor\" data-id=\"6c9ec21\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-text-editor elementor-clearfix\">\n\t\t\t\t<p>Po tej lekcji powiniene\u015b umie\u0107 zaimplementowa\u0107 p\u0119tle \u201cfor in\u201d i \u201cwhile\u201d w swoim kodzie.<\/p><p><span style=\"color: #7a7a7a;\"><span style=\"font-family: Roboto, sans-serif;\"><span style=\"font-size: medium;\">Nie zapomnij polubi\u0107\u00a0<\/span><\/span><\/span><a href=\"https:\/\/www.facebook.com\/lz.programming.courses\"><span style=\"color: #7a7a7a;\"><span style=\"font-family: Roboto, sans-serif;\"><span style=\"font-size: medium;\"><strong>stron\u0119 na facebooku<\/strong><\/span><\/span><\/span><\/a><span style=\"color: #7a7a7a;\"><span style=\"font-family: Roboto, sans-serif;\"><span style=\"font-size: medium;\">\u00a0i zapisa\u0107 si\u0119 do\u00a0<\/span><\/span><\/span><a href=\"https:\/\/www.lzych.pl\/en\/pl\/blog\/\"><span style=\"color: #7a7a7a;\"><span style=\"font-family: Roboto, sans-serif;\"><span style=\"font-size: medium;\"><strong>newsletter&#8217;a<\/strong><\/span><\/span><\/span><\/a><span style=\"color: #7a7a7a;\"><span style=\"font-family: Roboto, sans-serif;\"><span style=\"font-size: medium;\"><strong>\u00a0<\/strong><\/span><\/span><\/span><span style=\"color: #7a7a7a;\"><span style=\"font-family: Roboto, sans-serif;\"><span style=\"font-size: medium;\">aby dosta\u0107 informacj\u0119 o kolejnych \u015bwietnych lekcjach!<\/span><\/span><\/span><\/p>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-60ec753 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"60ec753\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t\t\t<div class=\"elementor-row\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-87243f4\" data-id=\"87243f4\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-column-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-a96c569 elementor-align-center elementor-widget elementor-widget-button\" data-id=\"a96c569\" data-element_type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t<a href=\"https:\/\/www.lzych.pl\/en\/python-tutorial-free-course-for-beginners-6-functions\/\" class=\"elementor-button-link elementor-button elementor-size-sm\" role=\"button\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t<span class=\"elementor-button-text\">Nast\u0119pna lekcja<\/span>\n\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>Dzisiaj poznamy kolejny super wa\u017cny element, kt\u00f3ry wykorzystywany jest praktycznie ca\u0142y czas w codziennej pracy programisty &#8211; p\u0119tle. Czym s\u0105 P\u0119tle? 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