maxvlaue.rb

# # Find the maximum 
# def maximum(arr)
#   arr.max
# end

def number(arr)
  a = "".to_i
  arr.each do |b|
    if a < b
      a = b
    end
  end
  a
end  
# expect it to return 42 below
result = number([2, 42, 22, 02])
puts "max of 2, 42, 22, 02 is: #{result}"

# # expect it to return nil when empty array is passed in
# result = maximum([])
# puts "max on empty set is: #{result.inspect}"

# result = maximum([-23, 0, -3])
# puts "max of -23, 0, -3 is: #{result}"

# result = maximum([6])
# puts "max of just 6 is: #{result}"