if() Deyimi: Programlamada Karar Verme Mekanizmas\u0131<\/p>\n
Merhaba! Programlama d\u00fcnyas\u0131na yeni ad\u0131m atanlar ve kodlama becerilerini geli\u015ftirmek isteyenler i\u00e7in bu makale, programlaman\u0131n temel yap\u0131 ta\u015flar\u0131ndan biri olan **if() deyimini** ayr\u0131nt\u0131l\u0131 bir \u015fekilde ele al\u0131yor. **if() deyimi**, program\u0131n\u0131z\u0131n belirli ko\u015fullara g\u00f6re farkl\u0131 eylemler ger\u00e7ekle\u015ftirmesini sa\u011flar. Bu sayede program\u0131n\u0131z daha dinamik, kullan\u0131c\u0131ya daha duyarl\u0131 ve ger\u00e7ek d\u00fcnya problemlerini \u00e7\u00f6zmek i\u00e7in daha uygun hale gelir.<\/p>\n
**if() deyimi**, programlama dillerinde **ko\u015fullu ifadelerin** \u00e7al\u0131\u015ft\u0131r\u0131lmas\u0131nda kullan\u0131lan bir yap\u0131d\u0131r. Ko\u015fullu ifade, program\u0131n belirli bir karar vermesi gereken bir durumdur. **if() deyimi** bu karar\u0131 almak i\u00e7in kullan\u0131l\u0131yor. Basit\u00e7e ifade etmek gerekirse, **if() deyimi** bir program\u0131n belirli bir ko\u015fulun kar\u015f\u0131lan\u0131p kar\u015f\u0131lanmad\u0131\u011f\u0131n\u0131 kontrol etmesini sa\u011flar. E\u011fer ko\u015ful kar\u015f\u0131lan\u0131yorsa, **if() blo\u011fu** i\u00e7indeki kodlar \u00e7al\u0131\u015ft\u0131r\u0131l\u0131r; e\u011fer ko\u015ful kar\u015f\u0131lanm\u0131yorsa, **if() blo\u011fu** atlat\u0131l\u0131r.<\/p>\n
**if() deyimi** genellikle \u015fu \u015fekilde kullan\u0131l\u0131r:<\/p>\n
“`html
\nif (ko\u015ful) {
\n \/\/ Ko\u015ful do\u011fruysa bu kodlar \u00e7al\u0131\u015f\u0131r
\n}
\n“`<\/p>\n
**ko\u015ful**, program\u0131n\u0131z\u0131n kontrol etmek istedi\u011fi bir ko\u015fuldur. Bu ko\u015ful genellikle bir **kar\u015f\u0131la\u015ft\u0131rma operat\u00f6r\u00fc** kullan\u0131larak tan\u0131mlan\u0131r. Kar\u015f\u0131la\u015ft\u0131rma operat\u00f6rleri, iki de\u011feri kar\u015f\u0131la\u015ft\u0131rmak ve sonucu **do\u011fru (true)** veya **yanl\u0131\u015f (false)** olarak d\u00f6nd\u00fcrmek i\u00e7in kullan\u0131l\u0131r. \u00d6rnekler:<\/p>\n
* **== (E\u015fittir):** \u0130ki de\u011ferin e\u015fit olup olmad\u0131\u011f\u0131n\u0131 kontrol eder.
\n* **!= (E\u015fit De\u011fildir):** \u0130ki de\u011ferin e\u015fit olup olmad\u0131\u011f\u0131n\u0131 kontrol eder ve e\u015fit de\u011filse **do\u011fru (true)** d\u00f6nd\u00fcr\u00fcr.
\n* **> (B\u00fcy\u00fckt\u00fcr):** Bir de\u011ferin di\u011ferinden b\u00fcy\u00fck olup olmad\u0131\u011f\u0131n\u0131 kontrol eder.
\n* **< (K\u00fc\u00e7\u00fckt\u00fcr):** Bir de\u011ferin di\u011ferinden k\u00fc\u00e7\u00fck olup olmad\u0131\u011f\u0131n\u0131 kontrol eder.\n* **>= (B\u00fcy\u00fck veya E\u015fittir):** Bir de\u011ferin di\u011ferinden b\u00fcy\u00fck veya e\u015fit olup olmad\u0131\u011f\u0131n\u0131 kontrol eder.
\n* **<= (K\u00fc\u00e7\u00fck veya E\u015fittir):** Bir de\u011ferin di\u011ferinden k\u00fc\u00e7\u00fck veya e\u015fit olup olmad\u0131\u011f\u0131n\u0131 kontrol eder.\n\n\n\n
**if() blo\u011fu**, ko\u015ful kar\u015f\u0131land\u0131\u011f\u0131nda \u00e7al\u0131\u015ft\u0131r\u0131lacak kodlar\u0131 i\u00e7erir. Ko\u015ful kar\u015f\u0131lanmazsa **if() blo\u011fu** atlat\u0131l\u0131r ve program **if() deyiminin** sonras\u0131nda devam eder.<\/p>\n
**\u00d6rnek 1: Kullan\u0131c\u0131 Girdisi Kontrol\u00fc**<\/p>\n
“`html
\nlet ya\u015f = prompt(“Ya\u015f\u0131n\u0131z\u0131 giriniz:”);<\/p>\n
if (ya\u015f >= 18) {
\n console.log(“Re\u015fit oldu\u011funuz i\u00e7in oy kullanabilirsiniz.”);
\n} else {
\n console.log(“Re\u015fit de\u011filsiniz, oy kullanamazs\u0131n\u0131z.”);
\n}
\n“`<\/p>\n
Bu \u00f6rnekte, program kullan\u0131c\u0131dan ya\u015f\u0131n\u0131 sorar. Kullan\u0131c\u0131n\u0131n girdi\u011fi ya\u015f 18 veya daha b\u00fcy\u00fckse, program **”Re\u015fit oldu\u011funuz i\u00e7in oy kullanabilirsiniz.”** mesaj\u0131n\u0131 g\u00f6r\u00fcnt\u00fcler. E\u011fer ya\u015f 18’den k\u00fc\u00e7\u00fckse, program **”Re\u015fit de\u011filsiniz, oy kullanamazs\u0131n\u0131z.”** mesaj\u0131n\u0131 g\u00f6r\u00fcnt\u00fcler.<\/p>\n
**\u00d6rnek 2: Say\u0131 Kontrol\u00fc**<\/p>\n
“`html
\nlet say\u0131 = 10;<\/p>\n
if (say\u0131 % 2 == 0) {
\n console.log(say\u0131 + ” \u00e7ift say\u0131d\u0131r.”);
\n} else {
\n console.log(say\u0131 + ” tek say\u0131d\u0131r.”);
\n}
\n“`<\/p>\n
Bu \u00f6rnekte, program **say\u0131** de\u011fi\u015fkenini kontrol eder. **say\u0131** de\u011fi\u015fkeni 2’ye tam b\u00f6l\u00fcnebiliyorsa, program **”\u00e7ift say\u0131d\u0131r”** mesaj\u0131n\u0131 g\u00f6r\u00fcnt\u00fcler. E\u011fer 2’ye tam b\u00f6l\u00fcnemiyorsa, program **”tek say\u0131d\u0131r”** mesaj\u0131n\u0131 g\u00f6r\u00fcnt\u00fcler.<\/p>\n
**if() deyimini** tek ba\u015f\u0131na kullanarak karma\u015f\u0131k kararlar almak m\u00fcmk\u00fcn olabilir ancak program\u0131n\u0131z daha karma\u015f\u0131kla\u015ft\u0131k\u00e7a, **if() deyimini** **else if** ve **else** bloklarlar\u0131yla birlikte kullanman\u0131z daha pratik hale gelir.<\/p>\n
**else if** blo\u011fu, **if() blo\u011fu** i\u00e7indeki ko\u015ful **yanl\u0131\u015f (false)** ise, program\u0131n kontrol edece\u011fi ba\u015fka bir ko\u015ful belirlemenizi sa\u011flar. **else if** blo\u011fu birden fazla olabilir.<\/p>\n
“`html
\nif (ko\u015ful1) {
\n \/\/ Ko\u015ful1 do\u011fruysa bu kodlar \u00e7al\u0131\u015f\u0131r
\n} else if (ko\u015ful2) {
\n \/\/ Ko\u015ful1 yanl\u0131\u015f ve ko\u015ful2 do\u011fruysa bu kodlar \u00e7al\u0131\u015f\u0131r
\n} else if (ko\u015ful3) {
\n \/\/ Ko\u015ful1 ve ko\u015ful2 yanl\u0131\u015f ve ko\u015ful3 do\u011fruysa bu kodlar \u00e7al\u0131\u015f\u0131r
\n} else {
\n \/\/ T\u00fcm ko\u015fullar yanl\u0131\u015fsa bu kodlar \u00e7al\u0131\u015f\u0131r
\n}
\n“`<\/p>\n
**else** blo\u011fu, **if() blo\u011fu** ve **else if** bloklar\u0131ndaki t\u00fcm ko\u015fullar **yanl\u0131\u015f (false)** ise \u00e7al\u0131\u015ft\u0131r\u0131lacak kodlar\u0131 i\u00e7erir. **else** blo\u011fu, **if() deyimi** i\u00e7inde iste\u011fe ba\u011fl\u0131d\u0131r.<\/p>\n
**if() deyimi**, programlamada **ko\u015fullu ifadeleri** i\u015flemek ve program\u0131n\u0131z\u0131n karar vermesini sa\u011flamak i\u00e7in temel bir ara\u00e7t\u0131r. Bu deyim, program\u0131n\u0131z\u0131 daha dinamik, kullan\u0131c\u0131ya daha duyarl\u0131 ve ger\u00e7ek d\u00fcnya problemlerini \u00e7\u00f6zmek i\u00e7in daha uygun hale getirir. **if() deyimini** anlamak, herhangi bir programlama dilinde g\u00fc\u00e7l\u00fc ve verimli kod yazmak i\u00e7in olmazsa olmazd\u0131r.<\/p>\n
Bu makalede **if() deyimi** konusunu ele ald\u0131k ve **if() deyimini** kullanarak \u00e7e\u015fitli \u00f6rnekler g\u00f6sterdik. Daha detayl\u0131 bilgi i\u00e7in [fatihsoysal.com](https:\/\/fatihsoysal.com) adresini ziyaret edebilirsiniz. Programlama yolculu\u011funuzda ba\u015far\u0131lar dilerim!<\/p>\n","protected":false},"excerpt":{"rendered":"if() Deyimi: Programlamada Karar Verme Mekanizmas\u0131 Merhaba! Programlama d\u00fcnyas\u0131na yeni ad\u0131m atanlar ve kodlama becerilerini geli\u015ftirmek isteyenler i\u00e7in…","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-2726","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-genel","7":"cs-entry","8":"cs-video-wrap"},"yoast_head":"\n