[Solved] Find the error in this Swift code snippet:var pair = (first: 1, second: 2) pair.first = 3 pair.2 = 4 | Swift

Swift - Data Types

Find the error in this Swift code snippet:

var pair = (first: 1, second: 2)
pair.first = 3
pair.2 = 4

AAccessing pair.2 is invalid; index out of range

BTuple elements cannot be changed after declaration

CTuple must be declared with let, not var

DTuple elements must be accessed by name only

Step-by-Step Solution

Solution:

Step 1: Check tuple mutability and access
Tuple declared with var can be changed. pair.first = 3 is valid.
Step 2: Check index access
Tuple has two elements indexed 0 and 1. pair.2 is invalid index, causing error.
Final Answer:
Accessing pair.2 is invalid; index out of range -> Option A
Quick Check:
Tuple index out of range = error [OK]

Quick Trick: Tuple indexes start at 0; max index is count-1 [OK]

Common Mistakes:

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