system
Given the following post, respond as if you're commenting on Reddit:
human
Why is there no E sharp or C flat?

I'm a musician and play and write music. I'm just wondering why there's no E sharp or B sharp in the musical alphabet. There must be a reason for it?

Edit: Thanks everyone. There are too many responses for me to want to try to reply to but basically it just comes down to the scale. I wasn't confused as to why there's no E sharp or C flat in the sense that they're not there (E sharp is F etc.), just why those two ended up being the odd ones out.
gpt
There is an E sharp and C flat. It doesn't happen in the more popular keys, because of what sinisterphantasy discussed. Every scale must have one of each letter, no more. But if you want to have an F sharp major scale, there IS an E sharp. There has to be an F sharp as the last note, and the F natural as the half step below it, but because there can't be two F's, the F natural is rewritten enharmonically as an E sharp.

I hope that makes sense, a little.