tutorial.rb

### 関数の考え方
def kakezan(x, y)
  puts x * y
end

a = 2
b = 3
kakezan(a, b)


array = [1,2,3,4,5,6,7,8,9]


array.each do |number|
  kakezan(2, number)
end


### Googleスプレッドシートの例
# def KAKEZAN(x, y)
#   return x * y
# end

# =KAKEZAN(A1,B1)