[Solved] Consider this Swift code:func fetchNumber() async -> Int { return 10 } Task { let num = await fetchNumber() print(num * 2) }What is the output? | iOS Swift

iOS Swift - Concurrency

Consider this Swift code:

func fetchNumber() async -> Int {
  return 10
}

Task {
  let num = await fetchNumber()
  print(num * 2)
}

What is the output?

A20

B10

CError: Cannot multiply Int

DNo output

Step-by-Step Solution

Solution:

Step 1: Await the async function result
The function returns 10 asynchronously, and await retrieves this value.
Step 2: Multiply and print the result
The code multiplies 10 by 2 and prints 20.
Final Answer:
20 -> Option A
Quick Check:
Async return used in expression = 20 [OK]

Quick Trick: Await async results before using them in calculations [OK]

Common Mistakes:

Master "Concurrency" in iOS Swift

9 interactive learning modes - each teaches the same concept differently

More iOS Swift Quizzes

Consider this Swift code: