Ana sayfa Genel Ruby Başlangıç Rehberi (Yorum satırları, değişken tanımlama,print ve puts fonksiyonu)

Ruby Başlangıç Rehberi (Yorum satırları, değişken tanımlama,print ve puts fonksiyonu)

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Ruby nesne tabanlı modern bir programlama dilidir. Yapısı gereği fonksiyonel programlama işlemlerini de kolayca gerçekleştirebilir. Ruby’nin hikayesine arzu ederseniz aşağıdaki adresten ulaşabilirsiniz.

https://www.ruby-lang.org/tr/about/

Programın çalışması için kullandığınız sisteme göre indirmeniz gerekenleri ise şuraya bırakıyorum.

https://rubyinstaller.org/downloads/

Rahat bir kullanımı olan Visual Studio Code editörünün linkini de şuraya koyuvereyim.

https://code.visualstudio.com/

Kodları çalıştırmak için .rb uzantılı bir dosya oluşturup, yazdıklarınızı terminalden çalıştırabilirsiniz.

View > Integrated Terminal sekmesinden, DEBUG CONSOLE‘un yanındaki TERMINAL‘e ulaşmalısınız.

Yazılan kodları kaydettikten sonra, terminale ” ruby dosya_ismi.rb ” şeklinde bir komut yazarak kodunuzu rahatlıkla çalıştırabilirsiniz.”

Konsolu temizlemek için ” ctrl + k ” sekmesini kullanabilirsiniz.

Öncelikle Ruby programlama diline “yorum satırları” ile giriş yapmak istiyorum. Tüm programcıların bildiği gibi yorum satırları, daha sonra olası geliştirme için muazzam bir öneme sahiptir. Eğer algoritmanız kompleks bir yapıya sahipse olası karışıkları bu şekilde önleyebilirsiniz.

Yorum satırlarını aşağıdaki basit Syntax ile oluşturabilirsiniz.

Bir sonraki değineceğimiz konu ise, değişken tanımlama kavramı. Daha önce programlama geçmişi olanların aşina olacağı ve programlamada birincil öneme sahip olan değişken tanımlama kavramını, bilmeyenler için kısaca değinmek gerekirse.

Çeşitli işlemleri yapmak için programlayıcıdan veya kullanıcıdan alınan bilginin sembolik bir değişken ile temsil edilme olayına, değişken tanımlama denir.

Sonuçları veya göstermek istediklerimizi de iki şekilde yazabiliriz.

print yazılacak_veri  yazım şekli art arda yazılan yazıyı alt alta değil de yan yana yazar. Örnek olarak:

puts yazılacak_veri fonksiyonu ise, art arda yazılan verileri direkt alt alta yazar.

Değişken tanımlama olayını anladığımıza göre artık değişkenler arası tür dönüşümünün nasıl yapıldığına bakabiliriz.

Bunun için genel bir tanım yapacak olursak

yeni_degisken = eski_degisken.to_i 

burada veriyi Integer‘e çevirdik, oysa Float veya String  veri tipine de dönüştürebiliriz.

Bunun için:

.to_f (Float’a dönüştürmek için)

.to_s (String’e dönüştürmek için)

Bir veriyi (Mesela bir Integer yani tam sayı değerini, float yani ondalıklı sayıya dönüştürmeye çalışalım.)

 

Şimdilik bu kadar, yeni bir yazımızda görüşmek üzere ! 🙂

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