caesar_cipher

#OBJECTIVE
#Implement a caesar cipher that takes in a string and the shift factor and then outputs the modified string



puts "enter a sentence"
input = gets.chomp						#store string in variable 'input'
puts "enter offset number"
offset = gets.chomp.to_i					#store number in variable 'offset'. Convert string to integer (gets.chomp by default returns a string value)


def caesar_cipher (x,num) 					#define method
	alpha = [] 						#create an empty array to store alphabet
	
	('a'..'z').each do |x| 					#iterate through a-z
		alpha << x					#store each letter in 'alpha' array
	end
	
	string = x.split("") 					#converts string to array. eg. ["h","e","l","l","o"]

	string.each do |y| 					#iterate through each letter in the string array
		alpha.each do |x| 				#iterate through each letter in the alphabet (alpha)
			if y == x 				#compare and find any matching letters
				index = alpha.index(x)		#find the index position of the matching letter in the "alpha" array
				index += num 			#offset index position based on "num" parameter
				print alpha[index]		#print letter
			end

		end

	end
	puts ""
end

caesar_cipher(input,offset)