Swift - Variables and Constants
Which of the following Swift variable declarations uses type inference correctly?
Which of the following Swift variable declarations uses type inference correctly?
easy📝 Syntax Q12 of 15
Step-by-Step Solution
Solution:
Step 1: Check syntax for variable declaration with type inference
Type inference allows omitting the type, solet number = 10is correct.Step 2: Identify syntax errors in other options
Options B, C, and D have syntax errors: missing type name, wrong order, or missing assignment operator.Final Answer:
let number = 10 -> Option AQuick Check:
Correct syntax with inference = let number = 10 [OK]
Quick Trick: Look for correct Swift syntax without explicit type [OK]
Common Mistakes:
- Adding colon without type name
- Writing type before variable name incorrectly
- Omitting assignment operator
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