reverse.rb

 def reverse_str(str)
     reversed_string=''
     i =0
     while i < str.length
        reversed_string=str[i] + reversed_string   # reverse
        
         i +=1
   end
    reversed_string
 end
 puts reverse_str("Hello")
 
#
 def reverse(string)
    #base case where we return the string if its length is one since you cant reverse string that has length of less than one
    if string.length==1
        string
    else
        #recursion case, where we will slice through the string to split it then concatenate the sliced string at the end of substring
        reverse(string[1..string.length]) +string[0]
    end
end
#calling the function
#string=gets.chomp
puts reverse("Gaudencia")