[Solved] Why does Swift require a guard statement to exit the current scope in its else block? — Ans: To ensure variables unwrapped by guard are always valid after the guard | Swift

Swift - Control Flow

Why does Swift require a guard statement to exit the current scope in its else block?

ATo ensure variables unwrapped by guard are always valid after the guard

BTo prevent infinite loops in guard statements

CTo allow guard to retry the condition automatically

DTo make guard statements optional in functions

Step-by-Step Solution

Solution:

Step 1: Understand guard's purpose for early exit
Guard unwraps variables safely and guarantees they are valid after the guard if the code continues.
Step 2: Why must else exit?
If the else block did not exit, the unwrapped variables could be invalid, breaking safety guarantees.
Final Answer:
To ensure variables unwrapped by guard are always valid after the guard -> Option A
Quick Check:
Guard exit ensures safe unwrapped variables [OK]

Quick Trick: Guard else exit keeps unwrapped variables safe [OK]

Common Mistakes:

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