insertionsort.rb

def  insertionsort(num)
  for j in 1..(num.length - 1) do
    key = num[j]
    i = j - 1
    while i >= 0 and num[i] > key
      num[i+1] = num[i]
      i = i - 1
    end
    num[i+1] = key
  end
  puts num
end

numbers = [23,34,46,87,12,1,66]

insertionsort(numbers)