What condition to use for checking whether at least a single negative element in a array?

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Neil Sam
Neil Sam2018-4-10
评论: Neil Sam ,2018-4-10
For example, what condition to use instead of '<' to execute the content inside if (to check if whether at least a single negative entry exists)?
A=[1;-1];
B=[3;4];
if (A.*B < 0)
disp (A.*B)
end

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