How do I print a '%' character using SPRINTF in MATLAB 7.7 (R2008b)?

I would like to print a string containing the '%' character. However, when I attempt the following:

sprintf('100%')

The output reads:

 100

Answer 1

[MathWorks Support Team]

To escape the percent symbol, use two percent signs. For example:

sprintf('100%%')

Yields the output:

 100%

[Walter Roberson]

str2write = '% whatever 75% ';
str2write = regexprep( str2write, '%', '%%' );

or

str2write = '% whatever 75% ';
str2write = strrep( str2write, '%', '%%' );

Answer 2

[Walter Roberson]

sprintf('%s', '100%')

The % are only "eaten" if they occur in the first parameter, the format position.