While D\u00f6ng\u00fcs\u00fc: Kodunuzu Tekrar Etmenin G\u00fc\u00e7l\u00fc Yolu<\/p>\n
Programlamada, belirli bir g\u00f6revi tekrar tekrar yapmak istedi\u011fimiz zamanlar olur. \u00d6rne\u011fin, bir listedeki t\u00fcm \u00f6\u011feleri i\u015flememiz veya bir ko\u015ful sa\u011flanana kadar bir i\u015flem yapmam\u0131z gerekebilir. Bu t\u00fcr durumlarda, while d\u00f6ng\u00fcleri devreye girer.<\/p>\n
While d\u00f6ng\u00fcs\u00fc, bir ko\u015ful do\u011fru oldu\u011fu s\u00fcrece belirli bir kod blo\u011funu tekrarlayan bir kontrol ak\u0131\u015f\u0131 yap\u0131s\u0131d\u0131r. Ko\u015ful genellikle bir Boolean ifadedir (true veya false). Ko\u015ful do\u011fru oldu\u011funda kod blo\u011fu \u00e7al\u0131\u015f\u0131r ve ko\u015ful yeniden de\u011ferlendirilir. Ko\u015ful false olana kadar bu d\u00f6ng\u00fc devam eder.<\/p>\n
Bir while d\u00f6ng\u00fcs\u00fcn\u00fcn temel yap\u0131s\u0131 \u015f\u00f6yledir:<\/p>\n
“`python
\nwhile ko\u015ful:
\n # Kod blo\u011fu
\n“`<\/p>\n
\u0130\u015fte while d\u00f6ng\u00fcs\u00fcn\u00fcn \u00e7al\u0131\u015fma ad\u0131mlar\u0131:<\/p>\n
1. **Ko\u015fulun De\u011ferlendirilmesi:** \u0130lk olarak, d\u00f6ng\u00fcn\u00fcn ba\u015flang\u0131c\u0131ndaki ko\u015ful de\u011ferlendirilir.
\n2. **Ko\u015ful True ise:** Ko\u015ful true ise kod blo\u011fu \u00e7al\u0131\u015ft\u0131r\u0131l\u0131r.
\n3. **Kod Blo\u011fu \u00c7al\u0131\u015ft\u0131rma:** Kod blo\u011fu \u00e7al\u0131\u015ft\u0131r\u0131ld\u0131\u011f\u0131nda, d\u00f6ng\u00fcn\u00fcn i\u00e7indeki t\u00fcm ifadeler s\u0131rayla y\u00fcr\u00fct\u00fcl\u00fcr.
\n4. **Ko\u015fulun Yeniden De\u011ferlendirilmesi:** Kod blo\u011fu \u00e7al\u0131\u015ft\u0131r\u0131ld\u0131ktan sonra, ko\u015ful tekrar de\u011ferlendirilir.
\n5. **D\u00f6ng\u00fcn\u00fcn Devam\u0131:** Ko\u015ful hala true ise, d\u00f6ng\u00fc 2. ad\u0131mdan itibaren tekrarlan\u0131r.
\n6. **D\u00f6ng\u00fcn\u00fcn Biti\u015fi:** Ko\u015ful false ise, d\u00f6ng\u00fc sona erer ve program y\u00fcr\u00fct\u00fclmeye devam eder.<\/p>\n
“`python
\ni = 1
\nwhile i <= 10:\n print(i)\n i += 1\n```\n\n\n\n
Bu kod, i de\u011fi\u015fkeninin de\u011ferini 1’den ba\u015flayarak 10’a kadar ekrana yazd\u0131r\u0131r. Her seferinde i de\u011fi\u015fkenine 1 eklenir ve ko\u015ful tekrar de\u011ferlendirilir.<\/p>\n
“`python
\ntoplam = 0
\nsayi = int(input(“Bir say\u0131 girin (0 ile \u00e7\u0131k\u0131\u015f): “))<\/p>\n
while sayi != 0:
\n toplam += sayi
\n sayi = int(input(“Bir say\u0131 girin (0 ile \u00e7\u0131k\u0131\u015f): “))<\/p>\n
print(“Toplam:”, toplam)
\n“`<\/p>\n
Bu kod, kullan\u0131c\u0131dan bir say\u0131 girmesini ister ve 0 girilene kadar say\u0131lar\u0131 toplar. Kullan\u0131c\u0131 0 girdi\u011finde d\u00f6ng\u00fc sona erer ve toplam de\u011fer ekrana yazd\u0131r\u0131l\u0131r.<\/p>\n
While d\u00f6ng\u00fcs\u00fc, tekrar eden i\u015flemler i\u00e7in g\u00fc\u00e7l\u00fc ve esnek bir yap\u0131d\u0131r. Baz\u0131 avantajlar\u0131 \u015funlard\u0131r:<\/p>\n
* **Ko\u015fula Dayal\u0131 Tekrar:** While d\u00f6ng\u00fcs\u00fc, belirli bir ko\u015ful sa\u011flanana kadar \u00e7al\u0131\u015f\u0131r, bu da onu ko\u015fula ba\u011fl\u0131 i\u015flemler i\u00e7in ideal hale getirir.
\n* **D\u00f6ng\u00fc Say\u0131s\u0131n\u0131n Belirsizli\u011fi:** While d\u00f6ng\u00fcs\u00fcnde, d\u00f6ng\u00fcn\u00fcn ka\u00e7 kez \u00e7al\u0131\u015faca\u011f\u0131 \u00f6nceden belirtilmez. Ko\u015ful false olana kadar d\u00f6ng\u00fc devam eder.
\n* **Ko\u015ful Esnekli\u011fi:** While d\u00f6ng\u00fcs\u00fcnde, ko\u015ful herhangi bir Boolean ifade olabilir. Bu, d\u00f6ng\u00fcn\u00fcn \u00e7e\u015fitli durumlarda kullan\u0131lmas\u0131na olanak tan\u0131r.<\/p>\n
While d\u00f6ng\u00fcs\u00fc baz\u0131 dezavantajlara da sahiptir:<\/p>\n
* **Sonsuz D\u00f6ng\u00fc Riski:** Ko\u015ful her zaman true ise, d\u00f6ng\u00fc sonsuza kadar \u00e7al\u0131\u015f\u0131r. Bu, program\u0131n\u0131z\u0131n tak\u0131lmas\u0131na neden olabilir.
\n* **Ko\u015fulun Do\u011frulanmas\u0131:** Ko\u015fulun d\u00f6ng\u00fc sona erdirecek \u015fekilde do\u011fru bir \u015fekilde ayarlanmas\u0131 \u00f6nemlidir. Aksi takdirde, d\u00f6ng\u00fc beklenmedik sonu\u00e7lar \u00fcretebilir.<\/p>\n
While d\u00f6ng\u00fcs\u00fc, programlamada tekrar eden i\u015flemleri ele almak i\u00e7in g\u00fc\u00e7l\u00fc bir ara\u00e7t\u0131r. Ko\u015fula dayal\u0131 tekrar, d\u00f6ng\u00fc say\u0131s\u0131n\u0131n belirsizli\u011fi ve ko\u015ful esnekli\u011fi gibi avantajlar\u0131 vard\u0131r. Ancak, sonsuz d\u00f6ng\u00fc riski ve ko\u015fulun do\u011fru bir \u015fekilde ayarlanmas\u0131 gerekti\u011fi gibi baz\u0131 dezavantajlar\u0131 da vard\u0131r. While d\u00f6ng\u00fcs\u00fcn\u00fcn nas\u0131l kullan\u0131laca\u011f\u0131n\u0131 ve nas\u0131l y\u00f6netilece\u011fini anlamak, etkili ve g\u00fcvenilir programlar yazmak i\u00e7in \u00f6nemlidir.<\/p>\n