A friend of mine has shown sometime ago the name of the below boolean technique/law but I forget that name unfortunately. Does someone know what it's called?

example in C language:

!(a || b)

It's a short to:

!a && !b
  • Did you mean to say !a && !b? – Rufflewind Aug 3 '14 at 18:25
  • yes, edited. I'm sorry. – Jack Aug 3 '14 at 18:27
  • In this case, the first is longer. – kevin cline Aug 3 '14 at 21:04

That's not a law - in fact it's quite wrong!

You want !a && !b. Then its one of De Morgan's laws.

  • yes, it was what I wanted. edited. I'm sorry. – Jack Aug 3 '14 at 18:37

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