12.2 Handling Warnings

Like an error, a warning is issued when something unexpected happens. Unlike an error, a warning doesn’t abort the currently running program. A simple example of a warning is when a number is divided by zero. In this case Octave will issue a warning and assign the value Inf to the result.

a = 1/0
     -| warning: division by zero
     ⇒ a = Inf

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https://octave.org/doc/v6.3.0/Handling-Warnings.html