Which of the following expressions correctly uses the logical NOT operator in Swift?

easy📝 Conceptual Q1 of 15

Swift - Data Types

Alet result = not true

Blet result = !true

Clet result = true!

Dlet result = !!true

Step-by-Step Solution

Solution:

Step 1: Understand the logical NOT operator syntax in Swift
In Swift, the NOT operator is represented by a single exclamation mark (!) placed before a Boolean value.
Step 2: Evaluate each option for correct syntax
let result = !true uses !true which is correct. let result = not true uses 'not' which is invalid in Swift. let result = true! places ! after true which is incorrect. let result = !!true uses double !! which is not valid syntax.
Final Answer:
let result = !true -> Option B
Quick Check:
Logical NOT operator = !true [OK]

Quick Trick: Use ! before a Boolean to invert it in Swift [OK]

Common Mistakes:

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