silly_methods

silly_methods.rb

# silly_sum 
def silly_sum numbers
  sum = 0
  numbers.each_with_index {|number, index|
    sum = sum + number*index
  }
  puts "sum = #{sum}"
end

puts "### silly_sum ###"
silly_sum([2])
silly_sum([2, 3])
silly_sum([2, 3, 5])
silly_sum([2, 3, 5, 7])

#num_squares
def num_squares max
  number_of_squares = 0
  for num in 1..max-1
    square_root = Math::sqrt(num)
    if(num == square_root.floor**2)
      number_of_squares += 1
    end
  end
  puts "number of square below #{max} = #{number_of_squares}"
end

puts "### num squares ###"
num_squares(5)
num_squares(10)
num_squares(25)

#silly_nums
def silly_nums max
  num_array = []
  for num in 1..max-1
    if num%3 == 0
      num_array.push(num) unless num%5 == 0
    elsif num%5 == 0
      num_array.push(num)
    end
  end
  puts num_array.inspect
end

puts "### silly nums ###"
silly_nums(3)
silly_nums(10)
silly_nums(20)