[Solved] Consider this Swift code:var x = 5 let y = x x = 10 print(y)What will be printed and why? — Ans: 5, because y is a constant copy of x's initial value | iOS Swift

iOS Swift - Swift Language Essentials

Consider this Swift code:

var x = 5
let y = x
x = 10
print(y)

What will be printed and why?

A10, because y tracks x's value

Bnil, because y is not initialized

CError, cannot assign var to let

D5, because y is a constant copy of x's initial value

Step-by-Step Solution

Solution:

Step 1: Understand value assignment
Variable x is 5 initially. y is a constant assigned the current value of x, which is 5.
Step 2: Reassign x and check y
Changing x to 10 does not affect y, because y holds its own copy of the value 5.
Final Answer:
5, because y is a constant copy of x's initial value -> Option D
Quick Check:
let copies value; later changes to var don't affect it [OK]

Quick Trick: let copies value at assignment; later var changes don't affect it [OK]

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