[Solved] Consider this Ruby code:def check(value) !value || value == 0 end puts check(nil) puts check(0) puts check(5)What will be the output? | Ruby

Ruby - Operators and Expressions

Consider this Ruby code:

def check(value)
  !value || value == 0
end

puts check(nil)
puts check(0)
puts check(5)

What will be the output?

Afalse false true

Btrue true false

Ctrue false true

Dfalse true false

Step-by-Step Solution

Solution:

Step 1: Evaluate check(nil)
!nil is true, so true || false = true.
Step 2: Evaluate check(0)
!0 is false (0 is truthy in Ruby), but 0 == 0 is true, so false || true = true.
Step 3: Evaluate check(5)
!5 is false, 5 == 0 is false, so false || false = false.
Final Answer:
Outputs are true true false -> Option B
Quick Check:
!value || value == 0 returns true for nil and 0 only [OK]

Quick Trick: !value is true only for nil or false in Ruby [OK]

Common Mistakes:

Master "Operators and Expressions" in Ruby

9 interactive learning modes - each teaches the same concept differently

More Ruby Quizzes

Consider this Ruby code: