http://www.perlmonks.org?node_id=1058591


in reply to Re^2: Perl returns NaN after addition
in thread Perl returns NaN after addition

or, if the OP happens to use Math::BigFloat

It's interesting that Math::BigFloat decides it has to numify a non-numeric string to NaN ... when everything else numifies such a string to zero.

Actually, I'm tempted to s/interesting/stupid/, but maybe there's a precedent somewhere that gives some credence to the Math::BigFloat behaviour.

Cheers,
Rob