{"id":1203,"date":"2025-06-02T08:06:20","date_gmt":"2025-06-02T08:06:20","guid":{"rendered":"https:\/\/ekomartantoh.net\/artikel\/?p=1203"},"modified":"2025-06-02T08:06:22","modified_gmt":"2025-06-02T08:06:22","slug":"ekspresi-regular","status":"publish","type":"post","link":"https:\/\/ekomartantoh.net\/artikel\/2025\/06\/02\/ekspresi-regular\/","title":{"rendered":"Ekspresi Regular"},"content":{"rendered":"\n<p>Pada penerapan <strong>ekspresi regular<\/strong> sebuah bahasa dikatakan <strong>regular<\/strong>, jika terdapat <strong>Finite State Automata<\/strong> yang <strong>menerimanya<\/strong>.<\/p>\n\n\n\n<p>Bahasa-bahasa yang diterima suatu Finite State Automata bisa dinyatakan sederhana dengan ekspresi regular<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Penerapan Ekspresi Regular (ER)<\/h2>\n\n\n\n<p>ER dimana memerikan suatu pola atau template untuk untai dari suatu bahasa, untai yang dimaksud yaitu yang menyusun dari suatu bahasa regular akan cocok dengan pola bahasa tersebut. Penerapan ekspresi regular yang tampak, misalnya pencarian (searching), utai karakter (string).<\/p>\n\n\n\n<p>Contoh penerapan yang lain adalah pembatasan data masukan yang diperkenankan, misalnya suatu field masukan hanya menerima input (0&#8230;.9).<\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1013\" height=\"566\" src=\"https:\/\/ekomartantoh.net\/artikel\/wp-content\/uploads\/2025\/06\/image.png\" alt=\"\" class=\"wp-image-1204\" style=\"width:383px;height:auto\" srcset=\"https:\/\/ekomartantoh.net\/artikel\/wp-content\/uploads\/2025\/06\/image.png 1013w, https:\/\/ekomartantoh.net\/artikel\/wp-content\/uploads\/2025\/06\/image-300x168.png 300w, https:\/\/ekomartantoh.net\/artikel\/wp-content\/uploads\/2025\/06\/image-768x429.png 768w\" sizes=\"auto, (max-width: 1013px) 100vw, 1013px\" \/><\/figure>\n\n\n\n<p>Bila dalam bahasa indonesia bisa dikatakan bahwa automata pada gambar 1 menerima masukan simbol input antara 0 sampai 9 sedangkan ekspresi regularnya dinyatakan sebagai: <strong><em>(digit) (digit)<\/em><\/strong>*.<br>Dengan digit adalah 0&#8230;.9.<\/p>\n\n\n\n<p>Dalam implementasi suatu FSA akan diterjemahkan menjadi kode dalam sebuah bahasa pemrograman.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"671\" height=\"267\" src=\"https:\/\/ekomartantoh.net\/artikel\/wp-content\/uploads\/2025\/06\/image-1.png\" alt=\"\" class=\"wp-image-1205\" style=\"width:379px;height:auto\" srcset=\"https:\/\/ekomartantoh.net\/artikel\/wp-content\/uploads\/2025\/06\/image-1.png 671w, https:\/\/ekomartantoh.net\/artikel\/wp-content\/uploads\/2025\/06\/image-1-300x119.png 300w\" sizes=\"auto, (max-width: 671px) 100vw, 671px\" \/><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Notasi Ekspresi Regular<\/h2>\n\n\n\n<p>Berikut notasi yang akan kita gunakan: (*) , (<sup>+<\/sup>) , (+) , (\u222a), &#8216;.&#8217; :<\/p>\n\n\n\n<p>* yaitu karakter asterik, berarti bisa tidak muncul, bisa juga muncul berhingga kali (0-n)<br><sup>+<\/sup> (pada posisi superscript\/diatas) berarti minimal muncul satu kali (1-n)<br>+ atau \u222a berarti union<br>. (titik) berarti konkatenasi, biasasanya titik dihilangkan, misal: ab bermakna sama seperti a.b<\/p>\n\n\n\n<p>Contoh ekspresi regular (ER)<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>ER : ab*cc<br>contoh string yang dibangkitkan: abcc, ab<strong>b<\/strong>cc, ab<strong>bb<\/strong>cc, ab<strong>bbb<\/strong>cc, acc<\/li>\n\n\n\n<li>ER : 010*<br>contoh string yang dibangkitkan: 01, 010, 010<strong>0<\/strong>, 010<strong>00<\/strong><\/li>\n\n\n\n<li>ER : a*d<br>contoh string yang dibangkitkan: d, ad, a<strong>a<\/strong>d, a<strong>aa<\/strong>d<\/li>\n\n\n\n<li>ER : a<sup>+<\/sup>d<br>contoh string yang dibangkitkan: ad, aad, aaad<br>(a minimal muncul sekali)<\/li>\n\n\n\n<li>ER : a*\u222ab* (ingat &#8216;\u222a&#8217; berarti atau)<br>contoh string yang dibangkitkan: a, b, aa, bb, aaa, bbb, aaaa, bbbb<\/li>\n\n\n\n<li>ER : a\u222ab<br>contoh string yang dibangkitkan: a, b<\/li>\n\n\n\n<li>ER : 01*+0<br>contoh string yang dibangkitkan: 0, 01, 011, 0111, 01111<\/li>\n\n\n\n<li><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Hubungan ER dan FSA<\/h2>\n\n\n\n<p>untuk setiap ER <strong>ada satu NDFA dengan transisi<\/strong> \u2208 (NFA \u2208-move) yang ekivalen.<br>Sementara untuk setiap DFA ada satu <strong>ER<\/strong> dari bahasa yang diterima oleh DFA.<br><em>Yang perlu diperhatikan state akhir akan menandakan apakah input diterima atau tidak.<\/em><br>contoh NFA \u2208-move untuk ER : ab<\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"718\" height=\"120\" src=\"https:\/\/ekomartantoh.net\/artikel\/wp-content\/uploads\/2025\/06\/image-2.png\" alt=\"\" class=\"wp-image-1206\" style=\"width:347px;height:auto\" srcset=\"https:\/\/ekomartantoh.net\/artikel\/wp-content\/uploads\/2025\/06\/image-2.png 718w, https:\/\/ekomartantoh.net\/artikel\/wp-content\/uploads\/2025\/06\/image-2-300x50.png 300w\" sizes=\"auto, (max-width: 718px) 100vw, 718px\" \/><\/figure>\n\n\n\n<p>contoh NFA \u2208-move untuk ER : <strong>a*b<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"584\" height=\"157\" src=\"https:\/\/ekomartantoh.net\/artikel\/wp-content\/uploads\/2025\/06\/image-3.png\" alt=\"\" class=\"wp-image-1207\" style=\"width:312px;height:auto\" srcset=\"https:\/\/ekomartantoh.net\/artikel\/wp-content\/uploads\/2025\/06\/image-3.png 584w, https:\/\/ekomartantoh.net\/artikel\/wp-content\/uploads\/2025\/06\/image-3-300x81.png 300w\" sizes=\"auto, (max-width: 584px) 100vw, 584px\" \/><\/figure>\n\n\n\n<p>contoh NFA \u2208-move untuk ER : <strong>a\u222ab<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"822\" height=\"295\" src=\"https:\/\/ekomartantoh.net\/artikel\/wp-content\/uploads\/2025\/06\/image-5.png\" alt=\"\" class=\"wp-image-1209\" style=\"width:432px;height:auto\" srcset=\"https:\/\/ekomartantoh.net\/artikel\/wp-content\/uploads\/2025\/06\/image-5.png 822w, https:\/\/ekomartantoh.net\/artikel\/wp-content\/uploads\/2025\/06\/image-5-300x108.png 300w, https:\/\/ekomartantoh.net\/artikel\/wp-content\/uploads\/2025\/06\/image-5-768x276.png 768w\" sizes=\"auto, (max-width: 822px) 100vw, 822px\" \/><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<p>Kemudian dari NDFA \u2208-move tersebut kita ubah ke NDFA dan selanjutnya ke DFA atau prosesnya sebagai berikut:<\/p>\n\n\n\n<p>            <strong> NFA \u2208-move \u2192 NFA \u2192 DFA<\/strong><\/p>\n\n\n\n<p>Bila ER cukup sederhana kita bisa langsung mengkonstruksikan NFA nya tanpa melalui  NFA \u2208-move.<\/p>\n\n\n\n<p>Contoh NFA untuk ER : <strong>ab<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"132\" src=\"https:\/\/ekomartantoh.net\/artikel\/wp-content\/uploads\/2025\/06\/image-6.png\" alt=\"\" class=\"wp-image-1210\" style=\"width:309px;height:auto\" srcset=\"https:\/\/ekomartantoh.net\/artikel\/wp-content\/uploads\/2025\/06\/image-6.png 600w, https:\/\/ekomartantoh.net\/artikel\/wp-content\/uploads\/2025\/06\/image-6-300x66.png 300w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure>\n\n\n\n<p>Contoh NFA untuk ER : <strong>a\u222ab<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"458\" height=\"274\" src=\"https:\/\/ekomartantoh.net\/artikel\/wp-content\/uploads\/2025\/06\/image-7.png\" alt=\"\" class=\"wp-image-1211\" style=\"width:237px;height:auto\" srcset=\"https:\/\/ekomartantoh.net\/artikel\/wp-content\/uploads\/2025\/06\/image-7.png 458w, https:\/\/ekomartantoh.net\/artikel\/wp-content\/uploads\/2025\/06\/image-7-300x179.png 300w\" sizes=\"auto, (max-width: 458px) 100vw, 458px\" \/><\/figure>\n\n\n\n<p>Contoh NFA untuk ER : <strong>010*<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"666\" height=\"138\" src=\"https:\/\/ekomartantoh.net\/artikel\/wp-content\/uploads\/2025\/06\/image-8.png\" alt=\"\" class=\"wp-image-1212\" style=\"width:357px;height:auto\" srcset=\"https:\/\/ekomartantoh.net\/artikel\/wp-content\/uploads\/2025\/06\/image-8.png 666w, https:\/\/ekomartantoh.net\/artikel\/wp-content\/uploads\/2025\/06\/image-8-300x62.png 300w\" sizes=\"auto, (max-width: 666px) 100vw, 666px\" \/><\/figure>\n\n\n\n<p>Contoh NFA untuk ER : <strong>0(1\u222a0)<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"630\" height=\"124\" src=\"https:\/\/ekomartantoh.net\/artikel\/wp-content\/uploads\/2025\/06\/image-9.png\" alt=\"\" class=\"wp-image-1213\" style=\"width:356px;height:auto\" srcset=\"https:\/\/ekomartantoh.net\/artikel\/wp-content\/uploads\/2025\/06\/image-9.png 630w, https:\/\/ekomartantoh.net\/artikel\/wp-content\/uploads\/2025\/06\/image-9-300x59.png 300w\" sizes=\"auto, (max-width: 630px) 100vw, 630px\" \/><\/figure>\n\n\n\n<p>Contoh NFA untuk ER : <strong>0(1\u222a0)*<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"449\" height=\"146\" src=\"https:\/\/ekomartantoh.net\/artikel\/wp-content\/uploads\/2025\/06\/image-11.png\" alt=\"\" class=\"wp-image-1215\" style=\"width:252px;height:auto\" srcset=\"https:\/\/ekomartantoh.net\/artikel\/wp-content\/uploads\/2025\/06\/image-11.png 449w, https:\/\/ekomartantoh.net\/artikel\/wp-content\/uploads\/2025\/06\/image-11-300x98.png 300w\" sizes=\"auto, (max-width: 449px) 100vw, 449px\" \/><\/figure>\n\n\n\n<p>Contoh NFA untuk ER : <strong>01* 0<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"627\" height=\"165\" src=\"https:\/\/ekomartantoh.net\/artikel\/wp-content\/uploads\/2025\/06\/image-12.png\" alt=\"\" class=\"wp-image-1216\" style=\"width:350px;height:auto\" srcset=\"https:\/\/ekomartantoh.net\/artikel\/wp-content\/uploads\/2025\/06\/image-12.png 627w, https:\/\/ekomartantoh.net\/artikel\/wp-content\/uploads\/2025\/06\/image-12-300x79.png 300w\" sizes=\"auto, (max-width: 627px) 100vw, 627px\" \/><\/figure>\n\n\n\n<p>Contoh NFA untuk ER : <strong>0*10*<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"437\" height=\"138\" src=\"https:\/\/ekomartantoh.net\/artikel\/wp-content\/uploads\/2025\/06\/image-13.png\" alt=\"\" class=\"wp-image-1217\" style=\"width:279px;height:auto\" srcset=\"https:\/\/ekomartantoh.net\/artikel\/wp-content\/uploads\/2025\/06\/image-13.png 437w, https:\/\/ekomartantoh.net\/artikel\/wp-content\/uploads\/2025\/06\/image-13-300x95.png 300w\" sizes=\"auto, (max-width: 437px) 100vw, 437px\" \/><\/figure>\n\n\n\n<p>Contoh NFA untuk ER : <strong>a*<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"250\" height=\"161\" src=\"https:\/\/ekomartantoh.net\/artikel\/wp-content\/uploads\/2025\/06\/image-14.png\" alt=\"\" class=\"wp-image-1218\" style=\"width:141px;height:auto\"\/><\/figure>\n\n\n\n<p>Contoh NFA untuk ER : <strong>a(ba)*<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"441\" height=\"240\" src=\"https:\/\/ekomartantoh.net\/artikel\/wp-content\/uploads\/2025\/06\/image-15.png\" alt=\"\" class=\"wp-image-1219\" style=\"width:244px;height:auto\" srcset=\"https:\/\/ekomartantoh.net\/artikel\/wp-content\/uploads\/2025\/06\/image-15.png 441w, https:\/\/ekomartantoh.net\/artikel\/wp-content\/uploads\/2025\/06\/image-15-300x163.png 300w\" sizes=\"auto, (max-width: 441px) 100vw, 441px\" \/><\/figure>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Pada penerapan ekspresi regular sebuah bahasa dikatakan regular, jika terdapat Finite State Automata yang menerimanya. Bahasa-bahasa yang diterima suatu Finite State Automata bisa dinyatakan sederhana dengan ekspresi regular Penerapan Ekspresi Regular (ER) ER dimana memerikan suatu pola atau template untuk untai dari suatu bahasa, untai yang dimaksud yaitu yang menyusun dari suatu bahasa regular akan [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_bbp_topic_count":0,"_bbp_reply_count":0,"_bbp_total_topic_count":0,"_bbp_total_reply_count":0,"_bbp_voice_count":0,"_bbp_anonymous_reply_count":0,"_bbp_topic_count_hidden":0,"_bbp_reply_count_hidden":0,"_bbp_forum_subforum_count":0,"footnotes":""},"categories":[101],"tags":[],"class_list":["post-1203","post","type-post","status-publish","format-standard","hentry","category-teori-bahasa-dan-otomata"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.2 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Ekspresi Regular - eko&#039;s Article<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"http:\/\/ekomartantoh.net\/artikel\/2025\/06\/02\/ekspresi-regular\/\" \/>\n<meta property=\"og:locale\" content=\"id_ID\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Ekspresi Regular - eko&#039;s Article\" \/>\n<meta property=\"og:description\" content=\"Pada penerapan ekspresi regular sebuah bahasa dikatakan regular, jika terdapat Finite State Automata yang menerimanya. 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