Swift - Functions
Which of the following is the correct way to declare a variable that holds a function taking two Ints and returning an Int?
Which of the following is the correct way to declare a variable that holds a function taking two Ints and returning an Int?
easy📝 Syntax Q12 of 15
Step-by-Step Solution
Solution:
Step 1: Recall Swift function type syntax
Function types are written as (ParameterTypes) -> ReturnType, with parameters separated by commas.Step 2: Check each option
var operation: (Int, Int) -> Int correctly uses (Int, Int) -> Int. Others have syntax errors or missing arrows.Final Answer:
var operation: (Int, Int) -> Int -> Option DQuick Check:
Correct function type syntax = var operation: (Int, Int) -> Int [OK]
Quick Trick: Use (Type1, Type2) -> ReturnType for function types [OK]
Common Mistakes:
- Omitting commas between parameter types
- Missing arrow '->' in function type
- Incorrect parameter grouping
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