Switch with compound cases in Swift - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ Predict Output

intermediate

Output of switch with multiple values in one case

What is the output of this Swift code?

Swift

let number = 3
switch number {
case 1, 3, 5:
    print("Odd number")
case 2, 4, 6:
    print("Even number")
default:
    print("Unknown")
}

A Odd number

B Compilation error

C Unknown

D Even number

💡 Hint

Check which case matches the value 3 in the switch statement.

The value 3 matches the first case which includes 1, 3, and 5, so it prints "Odd number".

❓ Predict Output

intermediate

Switch with range and multiple values

What will this Swift code print?

Swift

let score = 85
switch score {
case 0, 1..<50:
    print("Fail")
case 50..<80, 80:
    print("Pass")
case 81...100:
    print("Excellent")
default:
    print("Invalid score")
}

A Invalid score

B Pass

C Fail

D Excellent

💡 Hint

Look carefully at the ranges and values in each case.

The score 85 falls in the range 81...100, so it prints "Excellent".

🔧 Debug

advanced

Identify the error in compound case syntax

Which option shows the correct way to write a compound case with ranges in Swift?

Swift

let value = 7
switch value {
case 1...5, 6...10:
    print("Within range")
default:
    print("Out of range")
}

A case 1...5; 6...10: print("Within range")

B case 1...5 6...10: print("Within range")

C case 1...5, 6...10: print("Within range")

D case 1...5 && 6...10: print("Within range")

💡 Hint

Compound cases are separated by commas, not spaces or other symbols.

Only option C uses the correct comma to separate multiple patterns in one case.

❓ Predict Output

advanced

Switch with tuple and compound cases

What is the output of this Swift code?

Swift

let point = (2, 3)
switch point {
case (0, 0), (1, 1):
    print("Origin or near origin")
case (2, 3), (3, 2):
    print("Close to (2,3)")
default:
    print("Somewhere else")
}

A Close to (2,3)

B Origin or near origin

C Somewhere else

D Compilation error

💡 Hint

Check which tuple matches the value (2, 3).

The tuple (2, 3) matches the second case, so it prints "Close to (2,3)".

❓ Predict Output

expert

Switch with where clause and compound cases

What will this Swift code print?

Swift

let number = 15
switch number {
case let x where x % 3 == 0 || x % 5 == 0:
    print("Divisible by 3 or 5")
default:
    print("Not divisible by 3 or 5")
}

A Not divisible by 3 or 5

B Divisible by 3 or 5

C Compilation error

D Runtime error

💡 Hint

Check if 15 is divisible by 3 or 5.

15 is divisible by both 3 and 5, so the first case matches and prints "Divisible by 3 or 5".