{"id":6586,"date":"2026-04-13T11:50:38","date_gmt":"2026-04-13T11:50:38","guid":{"rendered":"http:\/\/the-codest.localhost\/dictionary\/floating-point\/"},"modified":"2026-04-13T11:50:50","modified_gmt":"2026-04-13T11:50:50","slug":"liukuluku","status":"publish","type":"dictionary","link":"https:\/\/thecodest.co\/fi\/dictionary\/floating-point\/","title":{"rendered":"Liukuluku"},"content":{"rendered":"

Liukuluku<\/h1>\n

Kelluva piste on tiedot<\/a> tyyppi, jota k\u00e4ytet\u00e4\u00e4n tietokoneohjelmoinnissa esitt\u00e4m\u00e4\u00e4n reaalilukuja, joilla on laaja valikoima suuruusluokkia ja tarkkuutta. Se on tieteellisen merkint\u00e4tavan bin\u00e4\u00e4rinen esitys, joka koostuu merkkibitist\u00e4, mantissasta ja eksponentista. Mantissa edustaa luvun merkitsevi\u00e4 numeroita, kun taas eksponentti edustaa luvun suuruutta.<\/p>\n

Liukulukuja k\u00e4ytet\u00e4\u00e4n monissa eri sovelluksissa, kuten tieteellisiss\u00e4 simulaatioissa, rahoituslaskelmissa ja tietokonegrafiikassa. Ne ovat v\u00e4ltt\u00e4m\u00e4tt\u00f6mi\u00e4 sellaisten arvojen esitt\u00e4misess\u00e4, joita ei voida esitt\u00e4\u00e4 tarkasti kokonaisluvuilla, kuten irrationaaliluvuilla ja desimaaliluvuilla.<\/p>\n

Yksi liukulukujen t\u00e4rkeimmist\u00e4 eduista on niiden kyky esitt\u00e4\u00e4 laaja arvoalue suhteellisen pienell\u00e4 muistim\u00e4\u00e4r\u00e4ll\u00e4. Ne eiv\u00e4t kuitenkaan ole aina tarkkoja, ja py\u00f6ristysvirheit\u00e4 voi esiinty\u00e4 laskutoimituksissa, joissa k\u00e4ytet\u00e4\u00e4n liukulukuja. N\u00e4m\u00e4 virheet voivat kasautua ajan mittaan ja johtaa ep\u00e4tarkkuuksiin laskelmissa.<\/p>\n

On olemassa useita erilaisia liukulukumuotoisia laskentamuotoja, kuten yhden ja kahden tarkkuuden laskentamuodot. Yhden tarkkuuden liukuluvuissa k\u00e4ytet\u00e4\u00e4n 32 bitti\u00e4 luvun esitt\u00e4miseen, kun taas kahden tarkkuuden liukuluvuissa k\u00e4ytet\u00e4\u00e4n 64 bitti\u00e4. Muodon valinta riippuu sovelluksesta ja vaaditusta tarkkuustasosta.<\/p>\n

Kaiken kaikkiaan liukuluvut ovat tehokas v\u00e4line reaalilukujen esitt\u00e4miseen tietokoneohjelmoinnissa. Vaikka ne eiv\u00e4t ole aina tarkkoja, ne ovat v\u00e4ltt\u00e4m\u00e4tt\u00f6mi\u00e4 monissa sovelluksissa, ja niit\u00e4 voidaan k\u00e4ytt\u00e4\u00e4 tehokkaasti, kunhan niiden rajoitukset otetaan huolellisesti huomioon.<\/p>","protected":false},"excerpt":{"rendered":"

Tutustu monipuoliseen tietotyyppiin, jota k\u00e4ytet\u00e4\u00e4n tietokoneohjelmoinnissa esitt\u00e4m\u00e4\u00e4n eri suuruisia ja tarkkuuksiltaan erilaisia reaalilukuja - kelluvaan pisteeseen.<\/p>","protected":false},"template":"","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"class_list":["post-6586","dictionary","type-dictionary","status-publish","hentry"],"acf":[],"yoast_head":"\nFloating Point - The Codest<\/title>\n<meta name=\"description\" content=\"Learn about the versatile data type used in computer programming to represent real numbers of various magnitudes and precision - Floating Point.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/thecodest.co\/fi\/sanakirja\/liukuluku\/\" \/>\n<meta property=\"og:locale\" content=\"fi_FI\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Floating Point\" \/>\n<meta property=\"og:description\" content=\"Learn about the versatile data type used in computer programming to represent real numbers of various magnitudes and precision - Floating Point.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/thecodest.co\/fi\/sanakirja\/liukuluku\/\" \/>\n<meta property=\"og:site_name\" content=\"The Codest\" \/>\n<meta property=\"article:modified_time\" content=\"2026-04-13T11:50:50+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/thecodest.co\/app\/uploads\/2024\/06\/cover-image.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"675\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/thecodest.co\\\/dictionary\\\/floating-point\\\/\",\"url\":\"https:\\\/\\\/thecodest.co\\\/dictionary\\\/floating-point\\\/\",\"name\":\"Floating Point - 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