You want to check if a variable x is either nil or false in Ruby. Which expression correctly uses logical operators to do this?

hard📝 Application Q8 of 15

Ruby - Operators and Expressions

You want to check if a variable x is either nil or false in Ruby. Which expression correctly uses logical operators to do this?

Ax == nil || x == false

Bx && (nil || false)

C!x && x == false

Dx || nil && false

Step-by-Step Solution

Solution:

Step 1: Understand the goal
We want to check if x is nil OR x is false.
Step 2: Evaluate each option
x == nil || x == false explicitly checks x == nil OR x == false, which is correct. Others misuse operators or logic.
Final Answer:
x == nil || x == false correctly checks the condition -> Option A
Quick Check:
Use explicit comparisons with || for OR checks [OK]

Quick Trick: Use explicit comparisons combined with || for OR checks [OK]

Common Mistakes:

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