NAND gate-

NAND gate is an universal gate having more than two inputs and only 1 output. These gate is form by using AND, NOT gate. The output of AND gate is given to the input for NOT gate so output of NAND gate is nothing but the compliment of product of inputs. The output of NAND gate is logic 1 when any one input is 0, otherwise when all the inputs are 1 then its output is 0.