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What is the primary purpose of a closure in Swift?

easy📝 Conceptual Q1 of 15
iOS Swift - Swift Language Essentials
What is the primary purpose of a closure in Swift?
ATo create a user interface element
BTo define a new data type
CTo encapsulate functionality that can be passed around and executed later
DTo store global variables
Step-by-Step Solution
Solution:

  1. Step 1: Understand what a closure is

    A closure is a block of code that can be stored and passed around like a variable.

  2. Step 2: Identify the main use

    Closures are mainly used to encapsulate functionality to be executed later or passed as arguments.

  3. Final Answer:

    To encapsulate functionality that can be passed around and executed later -> Option C

  4. Quick Check:

    Closure purpose = encapsulate functionality [OK]
Quick Trick: Closures hold code to run later or pass around [OK]
Common Mistakes:
  • Confusing closures with data types
  • Thinking closures create UI elements
  • Assuming closures store variables

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