def is_even?(n)
remainder_when_divided_by_2 = n % 2
if remainder_when_divided_by_2 == 0
return true
else
return false
end
end
def is_odd?(n)
return ! is_even?(n)
end
puts "1 is_even? #{is_even?(1)} - is_odd? #{is_odd?(1)}"
puts "2 is_even? #{is_even?(2)} - is_odd? #{is_odd?(2)}"
puts "3 is_even? #{is_even?(3)} - is_odd? #{is_odd?(3)}"
puts "4 is_even? #{is_even?(4)} - is_odd? #{is_odd?(4)}"
puts "5 is_even? #{is_even?(5)} - is_odd? #{is_odd?(5)}"
puts "6 is_even? #{is_even?(6)} - is_odd? #{is_odd?(6)}"
def is_even_and_divisible_by_five?(n)
remainder_when_divided_by_five = n % 5
if (remainder_when_divided_by_five == 0) && (is_even?(n) == true)
return true
else
return false
end
end
puts "5 is_even_and_divisible_by_five? #{is_even_and_divisible_by_five?(5)}"
puts "10 is_even_and_divisible_by_five? #{is_even_and_divisible_by_five?(10)}"
puts "15 is_even_and_divisible_by_five? #{is_even_and_divisible_by_five?(15)}"
puts "20 is_even_and_divisible_by_five? #{is_even_and_divisible_by_five?(20)}"
puts "25 is_even_and_divisible_by_five? #{is_even_and_divisible_by_five?(25)}"
puts "30 is_even_and_divisible_by_five? #{is_even_and_divisible_by_five?(30)}"
问题是我没有在代码底部的puts命令中调用is_even_and_divisible_by_five方法。我称它为is_even_and_divisble_by_5。然后在is_even_and_divisble_by_five方法的if语句中，我离开了Is_even的（n）论点。非常感谢大家！
偶数（可被2整除）和可被5整除也表示“被10整除”：
def is_even_and_divisible_by_five?(n)
n % 10 == 0
end
本文收集自互联网，转载请注明来源。
如有侵权，请联系[email protected] 删除。
我来说两句