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What does type inference mean in Swift?

easy📝 Conceptual Q11 of 15
Swift - Variables and Constants
What does type inference mean in Swift?
AThe program runs slower because types are guessed.
BYou must always write the type explicitly.
CThe compiler automatically figures out the variable's type.
DYou cannot use variables without specifying types.
Step-by-Step Solution
Solution:

  1. Step 1: Understand type inference concept

    Type inference means the compiler guesses the type of a variable based on the value assigned.

  2. Step 2: Compare options with definition

    Only The compiler automatically figures out the variable's type. correctly describes automatic type detection by the compiler.

  3. Final Answer:

    The compiler automatically figures out the variable's type. -> Option C

  4. Quick Check:

    Type inference = automatic type detection [OK]
Quick Trick: Type inference means compiler guesses type automatically [OK]
Common Mistakes:
  • Thinking you must always write types explicitly
  • Believing type inference slows down the program
  • Confusing type inference with dynamic typing

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