问题
Why in interpreted languages the # normally introduces a comment? This question was asked in an exam on Shell Programming but I don't find any hint on why it's the #.
Any ideas?
回答1:
make uses the #-comment construct; and sh, one the first shells, uses the same #-comment. The writers of later shells -- csh, ksh, bash, jsh, and more -- understood that it would be a burden on users if each were to have its own comment convention, particularly since all of these shell scripts can sort-of run under any shell.
To invent yet another comment convention would be to ensure that no one would use any newly-introduced shell.
The #-comment became a de facto standard very early in Unix history.
That's my take, anyway.
-- pete
来源：https://stackoverflow.com/questions/4995805/why-in-interpreted-languages-the-usually-introduces-a-comment