[Solved] Why would you use an inout parameter in a Swift function instead of returning a new value? — Ans: To allow the function to modify the original variable directly | Swift

Swift - Functions

Why would you use an inout parameter in a Swift function instead of returning a new value?

ATo declare a constant parameter that cannot be changed

BTo make the function run faster by avoiding copying

CTo ensure the parameter is immutable inside the function

DTo allow the function to modify the original variable directly

Step-by-Step Solution

Solution:

Step 1: Understand inout usage
In Swift, inout parameters allow a function to modify the original variable passed in, rather than working on a copy.
Step 2: Compare with returning values
Returning a new value creates a copy and requires assignment outside the function, while inout modifies the original directly.
Final Answer:
To allow the function to modify the original variable directly -> Option D
Quick Check:
Modifies original variable directly [OK]

Quick Trick: Inout lets functions change original variables [OK]

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Why would you use an inout parameter in a Swift function instead of returning a new value?