[Solved] Identify the error in this Swift code using TaskGroup: func fetchAll() async { let group = TaskGroup() group.addTask { 10 } group.addTask { 20 } for await value in group { print(value) } } | iOS Swift

iOS Swift - Concurrency

Identify the error in this Swift code using TaskGroup:

func fetchAll() async {
  let group = TaskGroup()
  group.addTask { 10 }
  group.addTask { 20 }
  for await value in group {
    print(value)
  }
}

ATaskGroup cannot be instantiated directly; use withTaskGroup instead

BMissing await keyword before addTask calls

Cfor await loop cannot be used with TaskGroup

DaddTask must return Void, not Int

Step-by-Step Solution

Solution:

Step 1: Check TaskGroup creation
TaskGroup is not created by direct init; use withTaskGroup function.
Step 2: Confirm correct usage
withTaskGroup provides a safe scope to add and await tasks.
Final Answer:
TaskGroup cannot be instantiated directly; use withTaskGroup instead -> Option A
Quick Check:
TaskGroup creation = withTaskGroup function [OK]

Quick Trick: Use withTaskGroup, not direct TaskGroup() init [OK]

Common Mistakes:

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Identify the error in this Swift code using TaskGroup: