What is the significance of “?” In swift?

824

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What are the type of integers does swift have?

747

---

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

794

---

What is swift programming language?

827

---

What are the features of swift programming?

833

---

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

841

---

How you define variables in swift language?

856

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What are the collection types available in swift?

720

---

What are the control transfer statements used in swift?

761

---

How to convert nsarray to nsmutablearray in swift?

922

---

What is new features in swift 4.0?

779

---

How to convert nsmutablearray to swift array in swift?

774

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What is type aliasing in swift?

838

---

What are the advantages of swift?

764

---

Is swift object oriented programming?

818

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