Ruby code that takes a string with an integer value and shifts each character by the integer value.

Caesar Cypher

def caesar_cypher(word, shift_amount)
  result = ""
  word.each_char do |character|
    letter_value = character.ord
    if (97..122).include?(letter_value)
      # shift lowercase letters
      result += (((letter_value - 97 + shift_amount) % 26) + 97).chr

    elsif (65..90).include?(letter_value)
      # shift the uppercase letters
      result += (((letter_value - 65 + shift_amount) % 26) + 65).chr

    else
      # everything else doesn't get shifted
      result += character
    end
  end
  result
end