Swift - Data Types
Which of the following is the correct way to declare a Boolean variable named
isActive and assign it the value true in Swift?Which of the following is the correct way to declare a Boolean variable named isActive and assign it the value true in Swift?
easy📝 Syntax Q3 of 15
Step-by-Step Solution
Solution:
Step 1: Check correct Boolean literal and type
In Swift, Boolean literals are lowercase true or false. The type Bool is used for Boolean variables.Step 2: Evaluate each option
var isActive: Bool = true correctly declares isActive as Bool and assigns true. var isActive = True uses capital True which is invalid. var isActive = "true" assigns a string "true" which is not Boolean. var isActive = 1 assigns an integer 1 which is not Boolean.Final Answer:
var isActive: Bool = true -> Option BQuick Check:
Boolean declaration uses Bool and true/false lowercase [OK]
Quick Trick: Use lowercase true/false and Bool type for Booleans [OK]
Common Mistakes:
- Using True instead of true
- Assigning strings or numbers
- Omitting type when needed
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