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How do you access a value for a key in a Swift dictionary?

easy📝 Conceptual Q2 of 15
Swift - Collections
How do you access a value for a key in a Swift dictionary?
AUsing parentheses with the key, like dict(key)
BUsing square brackets with the key, like dict[key]
CUsing dot notation, like dict.key
DUsing angle brackets, like dict<key>
Step-by-Step Solution
Solution:
  1. Step 1: Recall dictionary access syntax

    In Swift, dictionary values are accessed by placing the key inside square brackets after the dictionary name.
  2. Step 2: Eliminate incorrect options

    Parentheses, dot notation, and angle brackets are not used for dictionary key access in Swift.
  3. Final Answer:

    Using square brackets with the key, like dict[key] -> Option B
  4. Quick Check:

    Access dictionary value = dict[key] [OK]
Quick Trick: Use square brackets to get dictionary values [OK]
Common Mistakes:
  • Using parentheses instead of brackets
  • Trying dot notation for keys
  • Using angle brackets incorrectly

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