Swift - Data Types
Which of the following is the correct way to declare a variable price as a Double with value 19.99 in Swift?
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Which of the following is the correct way to declare a variable price as a Double with value 19.99 in Swift?
easy📝 Syntax Q12 of 15
Step-by-Step Solution
Solution:
Step 1: Check type and value compatibility
Double can store decimal numbers like 19.99 correctly.Step 2: Validate syntax
var price: Double = 19.99 uses correct syntax: variable name, type annotation, and decimal value.Final Answer:
var price: Double = 19.99 -> Option CQuick Check:
Double declaration syntax = var name: Double = value [OK]
Quick Trick: Use var name: Double = value for decimals [OK]
Common Mistakes:
- Using 'f' suffix which is invalid in Swift
- Assigning decimal to Int type
- Using quotes for numbers
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