<Table> Digits in 7 - segment display <Tr> <Th> ba dc </Th> <Th> 00 </Th> <Th> 01 </Th> <Th> 11 </Th> <Th> 10 </Th> </Tr> <Tr> <Th> 00 </Th> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Th> 01 </Th> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Th> 11 </Th> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Th> 10 </Th> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> </Tr> </Table> <Tr> <Th> ba dc </Th> <Th> 00 </Th> <Th> 01 </Th> <Th> 11 </Th> <Th> 10 </Th> </Tr> <Tr> <Th> 00 </Th> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Th> 01 </Th> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> </Tr>

Why we use don't care condition in k map