[Solved] What is wrong with this Swift code?let age = 25 age = 30 — Ans: Cannot assign to value: 'age' is a constant | iOS Swift

iOS Swift - Swift Language Essentials

What is wrong with this Swift code?

let age = 25
age = 30

ACannot assign to value: 'age' is a constant

BMissing semicolon after 25

CVariable 'age' not declared

DSyntax error: let cannot be used

Step-by-Step Solution

Solution:

Step 1: Identify declaration type
age is declared with let, making it a constant.
Step 2: Understand reassignment error
Trying to assign a new value to a constant causes a compile-time error: "Cannot assign to value: 'age' is a constant".
Final Answer:
Cannot assign to value: 'age' is a constant -> Option A
Quick Check:
let constants cannot be changed [OK]

Quick Trick: let means constant; reassignment causes error [OK]

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