[Solved] Why do Swift closures capture variables by reference rather than by value? — Ans: To allow closures to modify and keep updated state of captured variables | iOS Swift

iOS Swift - Swift Language Essentials

Why do Swift closures capture variables by reference rather than by value?

ATo allow closures to modify and keep updated state of captured variables

BBecause Swift does not support value types

CTo improve performance by copying variables

DTo prevent closures from accessing variables outside their scope

Step-by-Step Solution

Solution:

Step 1: Understand variable capture behavior
Closures capture variables by reference so changes inside closure affect the original variable.
Step 2: Identify reason for reference capture
This allows closures to maintain and update state over time.
Final Answer:
To allow closures to modify and keep updated state of captured variables -> Option A
Quick Check:
Closures capture by reference for state updates [OK]

Quick Trick: Closures capture variables by reference to keep state updated [OK]

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Why do Swift closures capture variables by reference rather than by value?