null created by barbchoy - https://repl.it/Br7N/2770

count_vowels.rb

# Write a method that takes a string and returns the number of vowels
# in the string. You may assume that all the letters are lower cased.
# You can treat "y" as a consonant.
#
# Difficulty: easy.

def count_vowels(string)
  i=0

  num_vowels=0
  vowels=["a","e","i","o","u"]
  letters=string.split('')
  while i<letters.length
  j=0
    while j<vowels.length
    if letters[i]===vowels[j]
      num_vowels=num_vowels+1
    end
    j+=1
    end
    i+=1
  end
  return num_vowels
end


# These are tests to check that your code is working. After writing
# your solution, they should all print true.

puts("\nTests for #count_vowels")
puts("===============================================")
    puts('count_vowels("abcd") == 1: ' + (count_vowels('abcd') == 1).to_s)
    puts('count_vowels("color") == 2: ' + (count_vowels('color') == 2).to_s)
    puts('count_vowels("colour") == 3: ' + (count_vowels('colour') == 3).to_s)
    puts('count_vowels("cecilia") == 4: ' + (count_vowels('cecilia') == 4).to_s)
puts("===============================================")