{"id":39,"date":"2025-09-24T21:58:17","date_gmt":"2025-09-24T19:58:17","guid":{"rendered":"http:\/\/python-ai.pl\/?p=39"},"modified":"2025-09-24T21:58:17","modified_gmt":"2025-09-24T19:58:17","slug":"petle-for-i-while","status":"publish","type":"post","link":"https:\/\/python-ai.pl\/?p=39","title":{"rendered":"P\u0119tle – for i while"},"content":{"rendered":"\n
\n

P\u0119tle w Pythonie<\/h4>\n\n\n\n

P\u0119tle pozwalaj\u0105 na wielokrotne wykonywanie tego samego kodu. W Pythonie mamy dwa g\u0142\u00f3wne typy p\u0119tli.<\/p>\n\n\n\n

P\u0119tla for:<\/h4>\n\n\n\n

U\u017cywana gdy wiemy ile razy chcemy co\u015b powt\u00f3rzy\u0107 lub gdy chcemy przej\u015b\u0107 przez wszystkie elementy kolekcji.<\/p>\n\n\n\n

P\u0119tla for z range():<\/h4>\n\n\n\n
<\/path><\/path><\/svg><\/span>
# P\u0119tla od 0 do 4 (5 iteracji)<\/span><\/span>\nfor<\/span> i <\/span>in<\/span> <\/span>range<\/span>(<\/span>5<\/span>):<\/span><\/span>\n    <\/span>print<\/span>(<\/span>f<\/span>"Krok <\/span>{<\/span>i<\/span>}<\/span>"<\/span>)<\/span><\/span>\n<\/span>\n# P\u0119tla od 1 do 5<\/span><\/span>\nfor<\/span> i <\/span>in<\/span> <\/span>range<\/span>(<\/span>1<\/span>, <\/span>6<\/span>):<\/span><\/span>\n    <\/span>print<\/span>(<\/span>f<\/span>"Liczba: <\/span>{<\/span>i<\/span>}<\/span>"<\/span>)<\/span><\/span>\n<\/span>\n# P\u0119tla z krokiem (co 2)<\/span><\/span>\nfor<\/span> i <\/span>in<\/span> <\/span>range<\/span>(<\/span>0<\/span>, <\/span>10<\/span>, <\/span>2<\/span>):<\/span><\/span>\n    <\/span>print<\/span>(<\/span>f<\/span>"Parzysta: <\/span>{<\/span>i<\/span>}<\/span>"<\/span>)<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
P\u0119tla for z list\u0105:<\/h4>\n\n\n\n
<\/path><\/path><\/svg><\/span>
fruits = [<\/span>"jab\u0142ko"<\/span>, <\/span>"banan"<\/span>, <\/span>"pomara\u0144cza"<\/span>]<\/span><\/span>\nfor<\/span> fruit <\/span>in<\/span> fruits:<\/span><\/span>\n    <\/span>print<\/span>(<\/span>f<\/span>"Lubi\u0119 <\/span>{<\/span>fruit<\/span>}<\/span>"<\/span>)<\/span><\/span>\n<\/span>\n# P\u0119tla z enumerate() - indeks i warto\u015b\u0107<\/span><\/span>\nfor<\/span> index, fruit <\/span>in<\/span> <\/span>enumerate<\/span>(fruits):<\/span><\/span>\n    <\/span>print<\/span>(<\/span>f<\/span>"<\/span>{<\/span>index + <\/span>1<\/span>}<\/span>. <\/span>{<\/span>fruit<\/span>}<\/span>"<\/span>)<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
P\u0119tla while:<\/h4>\n\n\n\n
U\u017cywana gdy nie wiemy ile razy co\u015b powt\u00f3rzy\u0107 – p\u0119tla wykonuje si\u0119 dop\u00f3ki warunek jest prawdziwy.<\/p>\n\n\n\n
<\/path><\/path><\/svg><\/span>
# Prosty licznik<\/span><\/span>\ncount = <\/span>0<\/span><\/span>\nwhile<\/span> count < <\/span>3<\/span>:<\/span><\/span>\n    <\/span>print<\/span>(<\/span>f<\/span>"Licznik: <\/span>{<\/span>count<\/span>}<\/span>"<\/span>)<\/span><\/span>\n    count += <\/span>1<\/span><\/span>\n<\/span>\n# P\u0119tla z warunkiem z\u0142o\u017conym<\/span><\/span>\npassword = <\/span>""<\/span><\/span>\nwhile<\/span> password != <\/span>"python123"<\/span>:<\/span><\/span>\n    password = <\/span>input<\/span>(<\/span>"Podaj has\u0142o: "<\/span>)<\/span><\/span>\nprint<\/span>(<\/span>"Has\u0142o poprawne!"<\/span>)<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
Kontrola p\u0119tli:<\/h4>\n\n\n\n
    \n
  • break<\/code> – przerywa p\u0119tl\u0119<\/li>\n\n\n\n
  • continue<\/code> – pomija reszt\u0119 iteracji<\/li>\n<\/ul>\n\n\n\n
    Przyk\u0142ad z break:<\/h4>\n\n\n\n
    <\/path><\/path><\/svg><\/span>
    for<\/span> i <\/span>in<\/span> <\/span>range<\/span>(<\/span>10<\/span>):<\/span><\/span>\n    <\/span>if<\/span> i == <\/span>5<\/span>:<\/span><\/span>\n        <\/span>break<\/span>  <\/span># Przerywa p\u0119tl\u0119 gdy i == 5<\/span><\/span>\n    <\/span>print<\/span>(i)<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
    \u0106wiczenie:<\/h4>\n\n\n\n
    Napisz program u\u017cywaj\u0105cy p\u0119tli for i while do wy\u015bwietlenia r\u00f3\u017cnych sekwencji liczb.<\/p>\n<\/div><\/div>\n","protected":false},"excerpt":{"rendered":"
    P\u0119tle w Pythonie P\u0119tle pozwalaj\u0105 na wielokrotne wykonywanie tego samego kodu. W Pythonie mamy dwa g\u0142\u00f3wne typy p\u0119tli. P\u0119tla for: U\u017cywana gdy wiemy ile razy chcemy co\u015b powt\u00f3rzy\u0107 lub gdy chcemy przej\u015b\u0107 przez wszystkie elementy kolekcji. P\u0119tla for z range(): P\u0119tla for z list\u0105: P\u0119tla while: U\u017cywana gdy nie wiemy ile razy co\u015b powt\u00f3rzy\u0107 – […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[4,3],"tags":[12,6,11,5,13],"class_list":["post-39","post","type-post","status-publish","format-standard","hentry","category-kurs","category-python","tag-for","tag-kurs","tag-petle","tag-python","tag-while"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/python-ai.pl\/index.php?rest_route=\/wp\/v2\/posts\/39","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/python-ai.pl\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/python-ai.pl\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/python-ai.pl\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/python-ai.pl\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=39"}],"version-history":[{"count":1,"href":"https:\/\/python-ai.pl\/index.php?rest_route=\/wp\/v2\/posts\/39\/revisions"}],"predecessor-version":[{"id":40,"href":"https:\/\/python-ai.pl\/index.php?rest_route=\/wp\/v2\/posts\/39\/revisions\/40"}],"wp:attachment":[{"href":"https:\/\/python-ai.pl\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=39"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/python-ai.pl\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=39"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/python-ai.pl\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=39"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}