Ruby program to remove duplicate values in array

Write a ruby program to remove duplicate values in array

class DeleteDuplicateElement
  def deleteDuplicateElement
    print "Enter the size of array"
    size = gets.chomp.to_i
    input_array = []
    print "Enter the elements of array"
    while size > 0 do 
      input_array.push(gets.chomp)
      size = size - 1 
    end
    print "Entered array is: #{input_array}"
    input_array.uniq!
    print "\nUniq array is: #{input_array}"
  end
end

p = DeleteDuplicateElement.new 
p.deleteDuplicateElement

Output:

Enter the size of array 5
Enter the elements of array 22
 33
 22
 11
 55
Entered array is: ["22", "33", "22", "11", "55"]
Uniq array is: ["22", "33", "11", "55"]