Ruby - Variables and Data Types
Which of the following is the correct syntax to check if variable
x is an instance of the Integer class using .is_a??Which of the following is the correct syntax to check if variable x is an instance of the Integer class using .is_a??
easy📝 Syntax Q12 of 15
Step-by-Step Solution
Solution:
Step 1: Recall the syntax of
The method.is_a?.is_a?requires a class argument inside parentheses, like.is_a?(ClassName).Step 2: Check each option
x.is_a?(Integer) uses correct syntax with parentheses and question mark. Options A, B, and D have syntax errors or missing parentheses.Final Answer:
x.is_a?(Integer) -> Option AQuick Check:
Use parentheses with.is_a?[OK]
Quick Trick: Always use parentheses with .is_a? method [OK]
Common Mistakes:
- Omitting parentheses after .is_a?
- Using angle brackets instead of parentheses
- Leaving out the question mark
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