Swift - Data Types
Which numeric literal correctly represents the decimal number 255 using octal notation in Swift?
Which numeric literal correctly represents the decimal number 255 using octal notation in Swift?
easy📝 Conceptual Q2 of 15
Step-by-Step Solution
Solution:
Step 1: Recall octal notation rules in Swift
Octal literals start with 0o and use digits 0-7 only.Step 2: Convert decimal 255 to octal
Decimal 255 equals octal 377. let octalValue = 0o377 matches this. let octalValue = 0o255 equals 173 decimal. let octalValue = 0o2F7 has invalid letter F. let octalValue = 0o400 is octal 400 which equals decimal 256.Final Answer:
let octalValue = 0o377 -> Option BQuick Check:
Octal literal for 255 = 0o377 [OK]
Quick Trick: Octal literals start with 0o and digits 0-7 only [OK]
Common Mistakes:
- Using digits 8 or 9 in octal literals
- Confusing octal with decimal or hex
- Incorrect prefix like 0x instead of 0o
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