[Solved] How do you properly declare and read a class variable in Ruby within a class? — Ans: Use @@variable to declare and access it inside class methods | Ruby

Ruby - Class Methods and Variables

How do you properly declare and read a class variable in Ruby within a class?

AUse <code>@variable</code> inside instance methods

BUse <code>@@variable</code> to declare and access it inside class methods

CUse <code>$variable</code> to declare a global variable

DUse <code>variable</code> without any prefix inside instance methods

Step-by-Step Solution

Solution:

Step 1: Understand class variable syntax
Class variables in Ruby are prefixed with @@ and shared across the class and its subclasses.
Step 2: Accessing class variables
They are typically accessed inside class methods or instance methods using @@variable.
Final Answer:
Use @@variable inside class methods -> Option B
Quick Check:
Class variables require @@ prefix [OK]

Quick Trick: Class variables always start with @@ [OK]

Common Mistakes:

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How do you properly declare and read a class variable in Ruby within a class?