Dangling Else

Dangling else is not a problem in Ruby. Ruby avoids the ambiguity caused by dangling else using the end statement to specify the structure of nested if-else conditionals [1].

dangling_else.rb

x = -3
if x.odd?
  if x >= 0
    puts "x is a positive odd integer"  
  else
    puts "x is a negative odd integer"
  end
end

The code above will print:

"x is a negative odd integer"

dangling_else.rb

x = -3
if x.odd?
  if x >= 0
    puts "x is a positive odd integer"
  end  
else
  puts "x is a negative odd integer"
end

The code above does not print anything but return nil since -3 is odd but x is negative.

Ruby avoids the ambiguity of the dangling else by specifying the structure of nested if-else using end statement.

Source code: https://github.com/yc015/Ruby-Inspect/blob/main/src/dangling_else.rb

Reference:
[1] https://www.tutorialspoint.com/ruby/ruby_if_else.htm Ruby if else - Tutorialspoint