Understanding functional

gistfile1.rb

variable_storing_a_function = Proc.new {|arg1,arg2| puts "First Argument : #{arg1}\nSecond Arguemt #{arg2}"}

variable_storing_a_function.call(1,2)


def an_example_function(variable1,variable2,&block)
  sum = variable1+variable2
  block.call(sum)
end


an_example_function(1,2){|sum| puts "Sum is:#{sum}"}