NAND Gate

The NAND function is a combination of two separate gates  function AND & NOT .
NAND function is a series combination of series AND gate and NOT gate.
The logic function of NAND gate in Boolean algebra is   A.B.

Above figure is for symbol of NAND gate.

Above figure is how we get output of NAND gate .

Truth table for NAND Gate.

Other  Gates

AND Gate

OR Gate

NOT Gate

NOR Gate