[Solved] What is wrong with this Swift code snippet?var colors: Set = ["red", "green", "blue"]colors.add("yellow") | Swift

Swift - Collections

What is wrong with this Swift code snippet?

var colors: Set = ["red", "green", "blue"]
colors.add("yellow")

AThe method 'add' does not exist for Set; use 'insert' instead.

BSets cannot contain string elements.

CYou cannot declare a Set with var, it must be let.

DThe Set must be initialized with parentheses, not brackets.

Step-by-Step Solution

Solution:

Step 1: Identify the method used
The code uses 'add' to insert an element into a Set.
Step 2: Check Swift Set API
Swift's Set type uses 'insert' to add elements, not 'add'.
Final Answer:
'add' is not a valid method; use 'insert' instead. -> Option A
Quick Check:
Check Set methods in Swift documentation [OK]

Quick Trick: Use 'insert' to add elements to a Set in Swift [OK]

Common Mistakes:

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