[Solved] Identify the error in this Swift code:let age = 30 age = 31 — Ans: Cannot assign to value: 'age' is a 'let' constant | Swift

Swift - Variables and Constants

Identify the error in this Swift code:

let age = 30
age = 31

AVariable 'age' is not initialized

BNo error, code runs fine

CMissing semicolon after first line

DCannot assign to value: 'age' is a 'let' constant

Step-by-Step Solution

Solution:

Step 1: Check variable declaration
age is declared with let, making it a constant.
Step 2: Analyze assignment
Trying to assign a new value to a constant causes a compile-time error.
Final Answer:
Cannot assign to value: 'age' is a 'let' constant -> Option D
Quick Check:
Assigning to let constant = compile error [OK]

Quick Trick: let constants cannot be reassigned after initialization [OK]

Common Mistakes:

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