Swift - Operators and Expressions
You want to assign a string describing a number's sign using the ternary operator. Which code correctly assigns "Positive", "Negative", or "Zero" to the variable sign?
You want to assign a string describing a number's sign using the ternary operator. Which code correctly assigns "Positive", "Negative", or "Zero" to the variable sign?
hard📝 Application Q8 of 15
Step-by-Step Solution
Solution:
Step 1: Understand the logic for sign assignment
We want "Positive" if number > 0, "Negative" if number < 0, and "Zero" otherwise.Step 2: Check each option's logic
let sign = number > 0 ? "Positive" : number < 0 ? "Negative" : "Zero" correctly nests ternary operators to check number > 0, then number < 0, else "Zero". let sign = number > 0 ? "Positive" : number < 0 ? "Zero" : "Negative" swaps "Zero" and "Negative" incorrectly. let sign = number > 0 ? "Positive" : "Negative" : "Zero" has invalid syntax with two colons. let sign = number > 0 ? "Positive" : number == 0 ? "Negative" : "Zero" swaps "Zero" and "Negative" incorrectly.Final Answer:
let sign = number > 0 ? "Positive" : number < 0 ? "Negative" : "Zero" -> Option BQuick Check:
Nested ternary matches sign logic [OK]
Quick Trick: Nest ternary operators carefully for multiple conditions [OK]
Common Mistakes:
- Swapping order of conditions
- Incorrect colon placement
- Using invalid syntax with multiple colons
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