[Solved] What will be the output of this Swift code snippet? let speed: Int = 100 let time: Int? = nil let distance = speed * (time ?? 0) print(distance) | iOS Swift

iOS Swift - Swift Language Essentials

What will be the output of this Swift code snippet?

let speed: Int = 100
let time: Int? = nil
let distance = speed * (time ?? 0)
print(distance)

A0

B100

Cnil

DCompilation error

Step-by-Step Solution

Solution:

Step 1: Understand the nil-coalescing operator usage
time is nil, so (time ?? 0) evaluates to 0.
Step 2: Calculate distance
distance = speed * 0 = 100 * 0 = 0.
Final Answer:
0 -> Option A
Quick Check:
Nil-coalescing replaces nil with default [OK]

Quick Trick: ?? operator provides default for nil [OK]

Common Mistakes:

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