Get directory separator char on Windows? ('\', '/', etc.)

Question

tl;dr: How do I ask Windows what the current directory separator character on the system is?

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Different versions of Windows seem to behave differently (e.g.

Answer 1

The standard forward slash (/) has always worked in all versions of DOS and Windows. If you use it, you don't have to worry about issues with how the backslash is displayed on Japanese and Korean versions of Windows, and you also don't have to special-case the path separator for Windows as opposed to POSIX (including Mac). Just use forward slash everywhere.