fprint problem in matlab

why the outstr value is 24 here ?

Answer 1

[Star Strider]

The fprintf fuction returns the number of bytes ouitput to the file.

You probably want sprintf instead here.

[Maria]

so the value it returns we wouudn't know unless we check somewhere?

[Star Strider]

In the code in your image of it (not the actual code, that I had to type in manually), the value is in ‘outstr’. It writes 24 bytes to the file, and the full string to your Command Window (the default output), returning 24 in ‘outstr’.

If you want it to return the actual string to your workspace, use:

outstr = sprintf('The answer is %s', data1);

That works. (I tested it.)