Given this code, what is the correct way to swap two mutable variables a and b in Swift?

hard📝 Application Q9 of 15

Swift - Variables and Constants

Given this code, what is the correct way to swap two mutable variables a and b in Swift?

var a = 5
var b = 10
// Swap a and b here

Alet temp = a temp = b b = temp

Bvar temp = a a = b b = temp

Ca = b b = a

Dvar temp = b b = a a = b

Step-by-Step Solution

Solution:

Step 1: Use a temporary variable to hold one value
Store a in temp so it is not lost when overwritten.
Step 2: Assign b to a and then temp to b
This completes the swap correctly.
Final Answer:
var temp = a a = b b = temp -> Option B
Quick Check:
Swap needs temp variable to avoid overwriting [OK]

Quick Trick: Use temp variable to swap values safely [OK]

Common Mistakes:

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