[Solved] Identify the error in this Swift code:let items = ["Pen", "Pencil"] items.append("Eraser") — Ans: Cannot append to a constant array | Swift

Swift - Collections

Identify the error in this Swift code:

let items = ["Pen", "Pencil"]
items.append("Eraser")

ANo error, code runs fine

BCannot append to a constant array

CSyntax error in array declaration

DEraser is not a valid string

Step-by-Step Solution

Solution:

Step 1: Check declaration of items
items is declared with let, so it is immutable.
Step 2: Append operation on immutable array
Appending to a constant array is not allowed and causes a compile-time error.
Final Answer:
Cannot append to a constant array -> Option B
Quick Check:
Appending to let array = Error [OK]

Quick Trick: Append only works on var arrays [OK]

Common Mistakes:

Master "Collections" in Swift

9 interactive learning modes - each teaches the same concept differently

More Swift Quizzes

Identify the error in this Swift code: