What is the significance of “?” In swift?

878

---

What are the type of integers does swift have?

801

---

What is the difference between swift and ‘objective-c’ language?

861

---

What is swift programming language?

896

---

What are the features of swift programming?

879

---

What is the floating point numbers and what are the types of floating number in swift?

920

---

How you define variables in swift language?

908

---

What are the collection types available in swift?

762

---

What are the control transfer statements used in swift?

806

---

How to convert nsarray to nsmutablearray in swift?

985

---

What is new features in swift 4.0?

841

---

How to convert nsmutablearray to swift array in swift?

836

---

What is type aliasing in swift?

916

---

What are the advantages of swift?

816

---

Is swift object oriented programming?

864

---