From a usability point of view, returning a string to indicate nothing found is probably the worst. an empty value or 0 would be much better.
Guillaume, I would say that that depends upon the intended 'audience' for the output.
give nth decimal place of pi
Find out missing number from a vector of 9 elements
Find the nearest integer
Write a code that will follow the equation y = x * (x + x) * x.
Matlab Basics - Convert a row vector to a column vector
Matlab Basics - Set unwanted parts of a vector to zero
Matlab Basics - Rounding I
Matlab Basics - y as a function of x
Matlab Basics II - Extract last 3 elements of a vector
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