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.
Back to basics 15 - Benchmark
Rotate input square matrix 90 degrees CCW without rot90
Find the logic
Rounding off numbers to n decimals
Sum of series VII
Matlab Basics - Rounding II
Matlab Basics - Set unwanted parts of a vector to zero
Matlab Basics - Rounding I
Matlab Basics II - Extract last 3 elements of a vector
Matlab Basics II - Create a vector with a repeated entry
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