Endianness refers to the order in which bytes are stored in a computer’s memory. There are two main types of endianness: big-endian and little-endian. In big-endian systems, the most significant byte of a multi-byte value is stored at the lowest memory address, while in little-endian systems, the least significant byte is stored at the lowest memory address.
Endianness is important because it can affect the way that data is interpreted by different programs and systems. For example, if a program is expecting data to be stored in big-endian format but the data is actually stored in little-endian format, the program may not be able to interpret the data correctly. This can lead to errors and unexpected behavior.