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.
Determine if input is odd
05 - Vector Equations 1
Area of a circle
Sum of series VI
Matlab Basics II - Log and natural log
Matlab Basics II - Free Fall
Matlab Basics II - Operations and Matrix Dimensions
Replace every 3rd element in a vector with 4
Matlab Basics - Create a row vector
Matlab Basics II - 3 Dimensional Arrays
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