Ruby - Class Methods and Variables
Which of the following is the correct syntax to define and use a class variable in Ruby?
Which of the following is the correct syntax to define and use a class variable in Ruby?
easy📝 Syntax Q12 of 15
Step-by-Step Solution
Solution:
Step 1: Identify class variable syntax
Class variables start with@@, so@@count = 0is correct for defining a class variable.Step 2: Differentiate other variable types
@countis an instance variable,$countis a global variable, andcountalone is a local variable.Final Answer:
class MyClass @@count = 0 end -> Option AQuick Check:
Class variable syntax uses @@ [OK]
Quick Trick: Class variables always start with @@ [OK]
Common Mistakes:
- Using @ instead of @@ for class variables
- Confusing global variables ($) with class variables
- Defining variables without any prefix
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