boolean expression using only nand gates code example

Example: nor nand gate

nor = not OR  ( opposite of OR gate result , 1 will be 0 ) 1+1 = 0 
nand = not AND  ( opposite of AND gate result , 1 will be 0 ) 1*1= 0

EXOR gate
# follow the source- link below this answer to get any answer of Logic gate