Roll N dice with X sides (NdX) and get the results

ndx.rb

def roll (n,d)
  arr = []
  n.times do
    arr.push(rand(1..d))
  end
  puts "Min: #{n}"
  puts "Max: #{n * d}"
  puts "Expected: #{(n + n * d) / 2}" # The Expexted roll value is rounded down
  puts "Total: #{arr.sum}"
  puts "Rolls: #{arr}"
end

# Example:
roll(3,8)