2 ms·
Unless you're on a UNIX system the number isn't important. If you are on a UNIX system, then it's useful for telling the difference between commands (like write
by spauldo 2y ago
Unless you're on a UNIX system the number isn't important. If you are on a UNIX system, then it's useful for telling the difference between commands (like write(1), hostname(1), or printf(1)), system calls (like write(2)), library functions (like printf(3)), or config files (like hostname(5)).
- kazinator 2y agoIn an article about C programming, the context tells you that everything that is given in a typewriter font is a C identifier, unless noted otherwise.