0th Floor

The US, Japan, and many other countries think of a ground floor as a first floor.

On the other hand, the UK, European countries, and Australia think of a ground floor as a 0th floor.

Therefore, a first floor for the UK corresponds to a second floor for us.

I have never thought that the counting from first floor is wrong, but for basement floors, we count B1 (-1), B2 (-2), ...

Considering the number increases by one each floor, it might make sense that the ground floor is a 0th floor.

Also, counting from zero is approachable for many programmers.

0階

アメリカや日本、その他多くの国では、建物の最初の階を1階としています。

一方、イギリスやオーストラリアでは、建物の最初の階を0階としています。

したがって、イギリスにとっての1階は、我々にとっての2階になります。

私はこれまで1階から数えることに何も疑問を抱いていませんでしたが、地下はB1（-1）、B2（-2）と数えていきます。

数字が1ずつ増えていくことを考えると、地上は0としたほうが理にかなっているかもしれません。

また、プログラマにとっても0からカウントするほうが親しみやすいです。

• The US, Japan, and many other countries think of a ground floor as a first floor.
• The US, Japan, and many other countries think of the ground floor as the first floor.

• On the other hand, the UK, European countries, and Australia think of a ground floor as a 0th floor.
• On the other hand, the UK, European countries, and Australia think of the ground floor as the 0th floor.

• Therefore, a first floor for the UK corresponds to a second floor for us.
• Therefore, a first floor for the UK corresponds to the second floor for us.

• I have never thought that the counting from first floor is wrong, but for basement floors, we count B1 (-1), B2 (-2), ...
• I have never thought that the counting from first floor is wrong, but for basement floors, we count B1 (-1), B2 (-2), etc.

• Considering the number increases by one each floor, it might make sense that the ground floor is a 0th floor.
• Considering the number increases by one each floor, it might make sense that the ground floor is the 0th floor.

• Also, counting from zero is approachable for many programmers.
• This sentence is perfect! No correction needed!

hope this helps!!