01111001

01111001 is an eight-bit binary numeral. It equals decimal 121 and hexadecimal 0x79. In ASCII it corresponds to the lowercase letter 'y'. In Unicode the code point U+0079 maps to this same character, and in UTF-8 it is encoded as the single byte 0x79 because it lies within the ASCII range.

In computing, 01111001 is commonly used to represent a single byte of binary data, a character in text encoding, or as an example in teaching binary and bitwise operations. Many programming languages accept binary literals such as 0b01111001 to denote this value, and it can be used in bit masks or flags.

As the binary representation of 'y', the string may appear in data streams, text files, or network protocols that include ASCII text. Its usage is generic and not tied to a single standard beyond its role as a byte value, but it is frequently encountered in contexts dealing with ASCII text and simple binary data.

See also: ASCII, Unicode, UTF-8, binary numeral system.