带逻辑运算符的表达式 - 它等同于什么？

Question

我有这个逻辑运算符表达式：

!(!(a != b) && (b > 7))

你如何简化它并找到等价物？

Answer 1

使用Demorgan's Laws.

!(!(a != b) && (b > 7))
!!(a != b) || !(b > 7)
a != b || b <= 7

Answer 2

正如其他人所提到的：Demorgan's Laws

!(!(a != b) && (b > 7)) // x != y --> !(x == y) 
!(!!(a == b) && (b > 7)) // !!x --> x 
!((a == b) && (b > 7)) // !(x && y) --> !x || !y
!(a == b) || !(b > 7) // !(x == y) --> x != y;; !(x > y) --> x <= y
(a != b) || (b <= 7)