On: Stack Overflow switches to system fonts on May 10,...

[jraph]

It's a zero, right? Easily verifiable by copy-pasting it in a Python or JavaScript interpreter.

It's pretty noticeable with the monospace font that used on my system because O is more like a circle and 0 is thinner. There is no slash, and it is fortunate because it could be mistaken with Ø otherwise.

[jolmg → jraph]

> There is no slash, and it is fortunate because it could be mistaken with Ø otherwise.

Another option, like on my system, is that zeros have a dot in the middle.