gistfile1.txt

#Codecademy give me an error saying "Oops, try again. It looks like your loop doesn't print out the numbers 18 to 0."
#the objective is to print all even numbers 0-18
#it prints it all correctly so what am I doing wrong?  Thanks for any help!
#Codecademy - Exercise - Loops & Iterators 9/18
for i in 0..18
    next if i % 2 == 1
    puts i
end

BTW, this is ruby. smh

Note that for loops aren't considered very Ruby-esque; using Range#each instead is much better.

Also, if the exercise text says "the numbers 18 to 0", you need to reverse your range.

18.downto(0).each do |i|
  next if i.odd?
  puts i
end

Your code runs perfect. But I think there is a problem with Codecademy

It's possible I'm missing a requirement in the exercise. Here's the exercise in full:

Next!
The next keyword can be used to skip over certain steps in the loop. For instance, if we don't want to print out the even numbers, we can write:

for i in 1..5
next if i % 2 == 0
print i
end
In the above example, we loop through the range of 1 through 5, assigning each number to i in turn.
If the remainder of i / 2 is zero, we go to the next iteration of the loop.
Then we print the value of i. This line only prints out 1, 3, and 5 because of the previous line.
Instructions
Add a line to your loop before your print statement. Use the next keyword so that you skip to the next iteration if the number i is odd.

Use the example above for help, but remember that the example above skips even numbers.

That can't be the entire exercise, can it? It doesn't mention that it wants the range 18 down to 0.

Anyway, if they use print instead of puts they might expect the actual output to be "181614121086420" (puts adds a newline).

18.downto(0).each do |i|
  next if i.odd?
  print i # Note the use of print
end

Or, using a for loop as they seem to want (although it's not very idiomatic Ruby) and modulo:

for i in 18.downto(0)
  next if i % 2 == 1
  print i # Note the use of print
end

That worked! Thanks a bunch!