What is the output of this Swift code?

medium📝 Predict Output Q4 of 15

Swift - Data Types

let x: Int = 4
let y: Double = 2.5
let z = Double(x) + y
print(z)

B6.5

CType error at compile time

D4.5

Step-by-Step Solution

Solution:

Step 1: Convert Int to Double explicitly
Double(x) converts 4 to 4.0 so it can be added to y (2.5).
Step 2: Add the two Double values
4.0 + 2.5 equals 6.5.
Final Answer:
6.5 -> Option B
Quick Check:
Explicit conversion allows addition = 6.5 [OK]

Quick Trick: Convert Int to Double before adding to Double [OK]

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