Swift Basic Operators Quiz

Topics : Ternary, Nil-Coalescing, Range, and Logical

Swift Basic Operators

6 mins read

1. What is the output of the following code snippet?

 let x = true
 let y = false
 let z = x && y || x
 print(z)

2. What is the value of "finalColor" in the following code snippet?

 let colorName: String? = “blue”
 let defaultColor = “red”
 let finalColor = colorName ?? defaultColor

3. What is the value of rowHeight in the following code snippet?

 let contentHeight = 40
 let hasHeader = true
 let rowHeight = contentHeight + (hasHeader ? 50 : 20)

4. What is the output of the following code snippet ?

 let range = …5
 print(range.contains(4))
 print(range.contains(7))

5. What is the output of the following code snippet?

 let names = [“Anna”, “Alex”, “Brian”, “Jack”]
 let count = names.count
 
 for i in 2..<count {
     print(names[i])
 }

6. What is the output of the following code snippet?

 let range = ..<5
 print(range.contains(5))

7. What is the output of the following code snippet?

 let names = [“Alice”, “Bob”, “Charlie”, “David”, “Eve”]
 let selectedNames = names[1…3]
 print(selectedNames.count)

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