Ruby - Variables and Data Types
Which of the following is a valid local variable name in Ruby?
Which of the following is a valid local variable name in Ruby?
easy📝 Conceptual Q11 of 15
Step-by-Step Solution
Solution:
Step 1: Check the first character of each variable name
Local variables must start with a lowercase letter or underscore. 'user_name' starts with 'u' which is lowercase.Step 2: Check for invalid characters
Variable names cannot contain hyphens or start with numbers. 'user-name' has a hyphen and '1username' starts with a number, so they are invalid.Final Answer:
user_name -> Option AQuick Check:
Valid local variable = user_name [OK]
Quick Trick: Local variables start lowercase or underscore, no hyphens or digits first [OK]
Common Mistakes:
- Starting variable names with uppercase letters
- Using hyphens instead of underscores
- Starting variable names with numbers
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