Byte : overview : remember

Summary

A byte is 8 bits. It encodes values 0-255 (unsigned) or -128 to 127 (two's complement). B means byte; b means bit. Storage uses bytes: 1 KB = 1000 B, 1 KiB = 1024 B. Larger: MB, MiB, GB, GiB. Bytes store characters: ASCII uses 1 byte; UTF-8 uses 1 to 4 bytes. Know limits, units, and conversions when working with memory, files, networks, and data types.