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Section 9.13 Negating Logical Expressions
Sometimes you might want to check whether a certain logical expression is NOT true, rather than finding out whether it is true. There are several ways to do so.
Aside: Video Description.
!(A && B) == !A || !B
!(A || B) == !A && !B
Check Your Understanding Check Your Understanding
1.
Which of the following is equivalent to
!(A<0 || B<0)?
A>=0 && B>=0
Correct
A>=0 || B>=0
Not quite. Try again!
!A<0 || !B<0
Not quite. Try again!
!A<0 && !B<0
Not quite. Try again!
