Boolen logic operations between integer numbers

2016 11 22
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更新时间：2016 11 22
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Dear All,
I would like to know the reasons why this happens:
>> 3 && -4
ans =
1
Thanks in advance for your kindly support.
Best Regards,
Josh

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Alexandra Harkai
Alexandra Harkai 2016-11-22
编辑：Alexandra Harkai 2016-11-22

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>> logical(3)
ans =
1
>> logical(-4)
ans =
1
So 1 && 1 = 1, according to the numeric-to-logical documentation.

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Guillaume
Guillaume 2016-11-22
To add to this, only 0 is considered false by matlab (and many many other languages)
Josh Shamir
Josh Shamir 2016-11-22
Thank you Alexandra Harkai and Guillaume for the valuable help.

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