[Solved] Given the Swift code:let temperatures = [72, 68, 75] temperatures[1] = 70 print(temperatures)What will happen when this code runs? | Swift

Swift - Collections

Given the Swift code:

let temperatures = [72, 68, 75]
temperatures[1] = 70
print(temperatures)

What will happen when this code runs?

AThe array prints without any changes.

BThe second element changes to 70 and prints the updated array.

CRuntime error when trying to assign a new value.

DCompilation error due to modifying an immutable array.

Step-by-Step Solution

Solution:

Step 1: Analyze let declaration
let makes the array immutable.
Step 2: Attempt to modify element
Modifying an element is a mutation, which is disallowed.
Final Answer:
Compilation error due to modifying an immutable array. -> Option D
Quick Check:
let arrays cannot be mutated [OK]

Quick Trick: let arrays are immutable; element assignment fails [OK]

Common Mistakes:

Master "Collections" in Swift

9 interactive learning modes - each teaches the same concept differently

More Swift Quizzes

Given the Swift code: