What is the syntax of fprintf

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Cian O'Regan 2015-11-30

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编辑： Stephen23 2015-11-30

In this example for writing to a file I understand each part except why the first line has 2 "n"s and the second line has an n'?

fprintf(nout,'No of iterations = %5d\n\n,niter);
fprintf(nout,Estimate of root = %12.4e\n', xf);

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Stephen23 2015-11-30

编辑：Stephen23 2015-11-30

Presumably your quoted string \u\n should actually be \n\n, which then matches your question. The escape code \u is not standard for any ASCII character.

Cian O'Regan 2015-11-30

Apologies for the typo, I have corrected it thank you. It is the 2 n's in the first line compared with one n in the second line that I don't understand.

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Answer 1

Stephen23 2015-11-30

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编辑：Stephen23 2015-11-30

在 MATLAB Online 中打开

Why not read the documentation?

http://www.mathworks.com/help/matlab/ref/fprintf.html

And part way down the page is a table of "Special characters that you cannot enter as ordinary text. This table shows how to represent special characters in formatSpec." Scan down the table and we find \n:

Special Character              Representation
Single quotation mark          ''
Percent character              %%
Backslash                      \\
...
New line                       \n
...

So whoever wrote that code specified two newline characters in one location, and just one newline in another location. The effect of two adjacent newline characters is to create an empty line. You would have to ask the code author why they wanted that.