The truth table for the NAND gate is commonly written in one of the two forms below, where the true state T is represented by 1 and the false state F is represented by 0.
The AND operation has the usual logical significance -- the outcome is true if, and only if, both inputs are true. The symbol for AND looks like the "dot" representing the usual multiplication of two numbers; note that the truth table looks correct for multiplication of "0"s and "1"s.
Last updated Oct. 27, 1998.
Copyright George Watson, Univ. of Delaware, 1998.