null created by barbchoy - https://repl.it/Br7Q/2500

palindrome.rb

# Write a method that takes a string and returns true if it is a
# palindrome. A palindrome is a string that is the same whether written
# backward or forward. Assume that there are no spaces; only lowercase
# letters will be given.
#
# Difficulty: easy.

def palindrome?(string)
  i=0
  palindrome_or_no=true
  
  letters=string.split('')
  j=letters.length-1
  
  while i<=j
  j=letters.length-i-1

    if letters[i]!=letters[j]
      palindrome_or_no=false
    end
  i+=1
  end
 
  return palindrome_or_no
end

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

puts("\nTests for #palindrome?")
puts("===============================================")
    puts('palindrome?("abc") == false: ' + (palindrome?('abc') == false).to_s)
    puts('palindrome?("abcba") == true: ' + (palindrome?('abcba') == true).to_s)
    puts('palindrome?("z") == true: ' + (palindrome?('z') == true).to_s)
    puts('palindrome?("abcddcba") == true: ' + (palindrome?('abcddcba') == true).to_s)
      puts('palindrome?("abcde") == false: ' + (palindrome?('abcde') == false).to_s)
puts("===============================================")