# 5. Sorting with Control Flow/ Code works, but don't understand

<Below this line, add a link to the EXACT exercise that you are stuck at.>

<In what way does your code behave incorrectly? Include ALL error messages.>
So my code works and passes fine, I understand what it’s doing.

But, unless I’m misunderstanding the instruction, my code should output the numbers in reverse order, but they are coming out as ascending order. Since the argument makes rev==true, why isn’t it printing out in reverse?

```

def alphabetize (arr, rev=false)
arr.sort!
if rev==true
arr.reverse!
else
arr.sort!
end
end

numbers = [9, 94, 81, 31, 22]

puts alphabetize (numbers)

``<do not remove the three backticks above>``
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In absence of a second argument `true` the function defaults to `false`. To reverse the order include the second argument in the call.

``````def alphabetize (arr, rev=false)
arr.sort!
if rev==true
arr.reverse!
end
arr
end

numbers = [9, 94, 81, 31, 22]

puts alphabetize(numbers)
puts
puts alphabetize(numbers,true)
``````

Output

``````9
22
31
81
94

94
81
31
22
9``````
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In absence of a second argument `true` the function defaults to `false`. To reverse the order include the second argument in the call.

``````def alphabetize (arr, rev=false)
arr.sort!
if rev==true
arr.reverse!
end
arr
end

numbers = [9, 94, 81, 31, 22]

puts alphabetize(numbers)
puts
puts alphabetize(numbers,true)
``````

Output

``````9
22
31
81
94

94
81
31
22
9
``````

This will raise a syntax error when two arguments are passed in. Remove the space character before `(`.

2 Likes

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