How to use sprintf to output the symbol % in a string?

Question

I want to convert a percentage to a string via sprintf. A workable way is like this:

sprintf(str, "%d", num);
strcat(str, "%");

But is there a way to only use sprintf to make it done?

Always consult the [man page](https://linux.die.net/man/3/sprintf): "A '%' is written. No argument is converted. The complete conversion specification is '%%'" — kaylum, Oct 13 '16 at 04:50
Possible duplicate of [How to escape the % sign in C's printf?](https://stackoverflow.com/questions/1860159/how-to-escape-the-sign-in-cs-printf) — nwellnhof, Oct 01 '17 at 12:26

score 0 · Answer 1 · answered Oct 01 '17 at 09:25

(Compiling an answer from comments, just to get this out of the list of unanswered questions.)

Printing a % via sprintf() is done via "%%", i.e. in your case thus:

sprintf(str, "%d%%", num);

Here is a quote from the helpful documentation:

A '%' is written. No argument is converted. The complete conversion specification is '%%'

1 Answers1