{"id":3513,"date":"2024-11-10T14:15:12","date_gmt":"2024-11-10T11:15:12","guid":{"rendered":"https:\/\/fatihsoysal.com\/blog\/c-temelleri-degiskenler-ve-veri-turleri\/"},"modified":"2024-11-10T14:15:12","modified_gmt":"2024-11-10T11:15:12","slug":"c-temelleri-degiskenler-ve-veri-turleri","status":"publish","type":"post","link":"https:\/\/fatihsoysal.com\/blog\/c-temelleri-degiskenler-ve-veri-turleri\/","title":{"rendered":"C# Temelleri: De\u011fi\u015fkenler ve Veri T\u00fcrleri"},"content":{"rendered":"<p>C# Temelleri: De\u011fi\u015fkenler ve Veri T\u00fcrleri<\/p>\n<p>Merhaba! Bu makalede, C# programlama dilinin temel ta\u015flar\u0131ndan biri olan de\u011fi\u015fkenleri ve veri t\u00fcrlerini ele alaca\u011f\u0131z. De\u011fi\u015fkenler, program\u0131m\u0131zda de\u011ferleri depolamak i\u00e7in kullan\u0131lan temel yap\u0131lard\u0131r. Veri t\u00fcrleri ise, bu de\u011ferlerin ne t\u00fcr veriler oldu\u011funu belirtir. Bu kavramlar\u0131 anlamak, C# ile yaz\u0131l\u0131m geli\u015ftirmeye ba\u015flamak i\u00e7in olmazsa olmazd\u0131r.<\/p>\n<h2>De\u011fi\u015fkenler<\/h2>\n<p>De\u011fi\u015fkenler, program\u0131m\u0131zda de\u011ferleri saklamak i\u00e7in kulland\u0131\u011f\u0131m\u0131z adland\u0131r\u0131lm\u0131\u015f konteynerlerdir. \u00d6rne\u011fin, bir ki\u015finin ad\u0131n\u0131, ya\u015f\u0131n\u0131 veya bir say\u0131y\u0131 depolamak i\u00e7in de\u011fi\u015fkenleri kullanabiliriz. Bir de\u011fi\u015fkeni tan\u0131mlamak i\u00e7in, \u00f6ncelikle veri t\u00fcr\u00fcn\u00fc belirtmemiz ve ard\u0131ndan de\u011fi\u015fkenin ad\u0131n\u0131 vermemiz gerekir. \u0130\u015fte bir de\u011fi\u015fkenin nas\u0131l tan\u0131mland\u0131\u011f\u0131na dair basit bir \u00f6rnek:<\/p>\n<p>&#8220;`csharp<br \/>\nint sayi;<br \/>\n&#8220;`<\/p>\n<p>Bu kod sat\u0131r\u0131, &#8220;sayi&#8221; adl\u0131 bir de\u011fi\u015fken tan\u0131mlar ve bu de\u011fi\u015fkenin veri t\u00fcr\u00fc &#8220;int&#8221; (integer) yani tam say\u0131 olarak belirtilir. De\u011fi\u015fkeni tan\u0131mlad\u0131ktan sonra, ona bir de\u011fer atayabiliriz:<\/p>\n<p>&#8220;`csharp<br \/>\nint sayi = 10;<br \/>\n&#8220;`<\/p>\n<p>\u015eimdi &#8220;sayi&#8221; de\u011fi\u015fkeni, 10 de\u011ferini sakl\u0131yor. De\u011fi\u015fkenlere istedi\u011fimiz kadar de\u011fer atayabilir, ancak her zaman ayn\u0131 veri t\u00fcr\u00fcnde de\u011fer atamam\u0131z gerekir. \u00d6rne\u011fin, &#8220;sayi&#8221; de\u011fi\u015fkenine bir metin de\u011feri atayamay\u0131z. <\/p>\n<h2>Veri T\u00fcrleri<\/h2>\n<p>Veri t\u00fcrleri, de\u011fi\u015fkenlerin hangi t\u00fcr verileri depolayaca\u011f\u0131n\u0131 belirler. C# dilinde, say\u0131lar, metinler, mant\u0131ksal de\u011ferler gibi \u00e7e\u015fitli veri t\u00fcrleri mevcuttur.<\/p>\n<h3>Temel Veri T\u00fcrleri<\/h3>\n<p>C#&#8217;da en s\u0131k kullan\u0131lan temel veri t\u00fcrleri \u015funlard\u0131r:<\/p>\n<ul>\n<li>**int**: Tam say\u0131lar\u0131 temsil etmek i\u00e7in kullan\u0131l\u0131r. \u00d6rnek: 10, -5, 0<\/li>\n<li>**double**: Ondal\u0131kl\u0131 say\u0131lar\u0131 temsil etmek i\u00e7in kullan\u0131l\u0131r. \u00d6rnek: 3.14, 2.718, -0.5<\/li>\n<li>**bool**: Mant\u0131ksal de\u011ferleri (do\u011fru veya yanl\u0131\u015f) temsil etmek i\u00e7in kullan\u0131l\u0131r. \u00d6rnek: true, false<\/li>\n<li>**char**: Tek bir karakteri temsil etmek i\u00e7in kullan\u0131l\u0131r. \u00d6rnek: &#8216;A&#8217;, &#8216;B&#8217;, &#8216;1&#8217;, &#8216;!&#8217;<\/li>\n<li>**string**: Metin dizilerini temsil etmek i\u00e7in kullan\u0131l\u0131r. \u00d6rnek: &#8220;Merhaba&#8221;, &#8220;D\u00fcnya&#8221;, &#8220;C#&#8221;<\/li>\n<\/ul>\n<h3>Referans T\u00fcrleri<\/h3>\n<p>De\u011fi\u015fkenler ayr\u0131ca referans t\u00fcrleri olarak da tan\u0131mlanabilir. Referans t\u00fcrleri, nesneleri temsil etmek i\u00e7in kullan\u0131l\u0131r. Nesneler, verileri ve y\u00f6ntemleri bir araya getiren karma\u015f\u0131k yap\u0131lard\u0131r. Referans t\u00fcrleri, de\u011fi\u015fkenlerin bellekte depolanan bir nesnenin adresini tutmas\u0131na olanak tan\u0131r.<\/p>\n<p>\u00d6rne\u011fin, &#8220;string&#8221; veri t\u00fcr\u00fc, bir nesneyi temsil eden bir referans t\u00fcr\u00fcd\u00fcr. Bir de\u011fi\u015fkeni string veri t\u00fcr\u00fcnde tan\u0131mlad\u0131\u011f\u0131n\u0131zda, bu de\u011fi\u015fken bellekte depolanan bir string nesnesine i\u015faret eder. <\/p>\n<h2>De\u011fi\u015fken Adland\u0131rma Kurallar\u0131<\/h2>\n<p>De\u011fi\u015fkenler i\u00e7in ge\u00e7erli adland\u0131rma kurallar\u0131 \u015funlard\u0131r:<\/p>\n<ul>\n<li>De\u011fi\u015fken adlar\u0131 harf veya alt \u00e7izgi (_) ile ba\u015flamal\u0131d\u0131r.<\/li>\n<li>De\u011fi\u015fken adlar\u0131nda rakamlar kullan\u0131labilir, ancak ilk karakter olamaz.<\/li>\n<li>De\u011fi\u015fken adlar\u0131 b\u00fcy\u00fck-k\u00fc\u00e7\u00fck harf duyarl\u0131d\u0131r.<\/li>\n<li>De\u011fi\u015fken adlar\u0131 bo\u015fluk i\u00e7eremez.<\/li>\n<li>De\u011fi\u015fken adlar\u0131 anlaml\u0131 ve a\u00e7\u0131klay\u0131c\u0131 olmal\u0131d\u0131r.<\/li>\n<\/ul>\n<h2>\u00d6rnek Kod<\/h2>\n<p>\u0130\u015fte de\u011fi\u015fkenler ve veri t\u00fcrlerini kullanarak basit bir C# program\u0131 \u00f6rne\u011fi:<\/p>\n<p>&#8220;`csharp<br \/>\nusing System;<\/p>\n<p>public class Program<br \/>\n{<br \/>\n    public static void Main(string[] args)<br \/>\n    {<br \/>\n        \/\/ Bir tam say\u0131 de\u011fi\u015fkeni tan\u0131mla<br \/>\n        int sayi = 10;<\/p>\n<p>        \/\/ Bir ondal\u0131k say\u0131 de\u011fi\u015fkeni tan\u0131mla<br \/>\n        double ondalikSayi = 3.14;<\/p>\n<p>        \/\/ Bir metin de\u011fi\u015fkeni tan\u0131mla<br \/>\n        string metin = &#8220;Merhaba D\u00fcnya!&#8221;;<\/p>\n<p>        \/\/ De\u011fi\u015fkenlerin de\u011ferlerini ekrana yazd\u0131r<br \/>\n        Console.WriteLine(&#8220;Tam say\u0131: &#8221; + sayi);<br \/>\n        Console.WriteLine(&#8220;Ondal\u0131k say\u0131: &#8221; + ondalikSayi);<br \/>\n        Console.WriteLine(&#8220;Metin: &#8221; + metin);<br \/>\n    }<br \/>\n}<br \/>\n&#8220;`<\/p>\n<h2>Sonu\u00e7<\/h2>\n<p>Bu makalede, C# programlama dilindeki de\u011fi\u015fkenleri ve veri t\u00fcrlerini ele ald\u0131k. De\u011fi\u015fkenler, program\u0131m\u0131zda de\u011ferleri depolamak i\u00e7in olmazsa olmaz yap\u0131lard\u0131r. Veri t\u00fcrleri ise, bu de\u011ferlerin ne t\u00fcr veriler oldu\u011funu belirtir. Bu kavramlar\u0131 anlayarak, C# ile yaz\u0131l\u0131m geli\u015ftirme yolculu\u011funuza sa\u011flam bir temel olu\u015fturabilirsiniz.<\/p>\n<p>De\u011fi\u015fkenler ve veri t\u00fcrleri, C#&#8217;nin en temel yap\u0131 ta\u015flar\u0131ndan biridir. Bu konular\u0131 iyice kavramak, daha karma\u015f\u0131k yaz\u0131l\u0131m geli\u015ftirme projelerine ad\u0131m atmak i\u00e7in olmazsa olmazd\u0131r. Daha fazla bilgi i\u00e7in [C# Belgeleme](https:\/\/docs.microsoft.com\/en-us\/dotnet\/csharp\/programming-guide\/) veya [Fatih Soysal](https:\/\/fatihsoysal.com\/) sitesini ziyaret edebilirsiniz.<\/p>\n<p>#Etiketler: C#, De\u011fi\u015fken, Veri T\u00fcr\u00fc, Programlama, Temel, Ba\u015flang\u0131\u00e7, Kod, Yaz\u0131l\u0131m, \u00d6\u011frenme<\/p>\n","protected":false},"excerpt":{"rendered":"C# Temelleri: De\u011fi\u015fkenler ve Veri T\u00fcrleri Merhaba! Bu makalede, C# programlama dilinin temel ta\u015flar\u0131ndan biri olan de\u011fi\u015fkenleri ve&hellip;","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"csco_page_header_type":"","csco_page_load_nextpost":"","csco_page_subscribe_form":"","csco_page_contact_form":"","footnotes":""},"categories":[1],"tags":[],"class_list":{"0":"post-3513","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-genel","7":"cs-entry","8":"cs-video-wrap"},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v20.5 (Yoast SEO v25.3.1) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>C# Temelleri: De\u011fi\u015fkenler ve Veri T\u00fcrleri<\/title>\n<meta name=\"description\" content=\"Merhaba! Bu makalede, C# programlama dilinin temel ta\u015flar\u0131ndan biri olan de\u011fi\u015fkenleri ve veri t\u00fcrlerini ele alaca\u011f\u0131z. De\u011fi\u015fkenler, program\u0131m\u0131zda de\u011ferleri depolamak i\u00e7in kullan\u0131lan temel yap\u0131lard\u0131r. Veri t\u00fcrleri ise, bu de\u011ferlerin ne t\u00fcr veriler oldu\u011funu belirtir. Bu kavramlar\u0131 anlamak, C# ile yaz\u0131l\u0131m geli\u015ftirmeye ba\u015flamak i\u00e7in olmazsa olmazd\u0131r.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/fatihsoysal.com\/blog\/c-temelleri-degiskenler-ve-veri-turleri\/\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"C# Temelleri: De\u011fi\u015fkenler ve Veri T\u00fcrleri\" \/>\n<meta property=\"og:description\" content=\"Merhaba! Bu makalede, C# programlama dilinin temel ta\u015flar\u0131ndan biri olan de\u011fi\u015fkenleri ve veri t\u00fcrlerini ele alaca\u011f\u0131z. 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Bu makalede, C# programlama dilinin temel ta\u015flar\u0131ndan biri olan de\u011fi\u015fkenleri ve veri t\u00fcrlerini ele alaca\u011f\u0131z. De\u011fi\u015fkenler, program\u0131m\u0131zda de\u011ferleri depolamak i\u00e7in kullan\u0131lan temel yap\u0131lard\u0131r. Veri t\u00fcrleri ise, bu de\u011ferlerin ne t\u00fcr veriler oldu\u011funu belirtir. 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