0x16

0x16 is a hexadecimal numeral used in computing to denote the value 22 in decimal. The prefix 0x indicates that the digits that follow are base-16. In most programming languages, a literal written as 0x16 evaluates to the integer 22. Because each hexadecimal digit represents four bits, 0x16 is a two-digit hex value and corresponds to the 8-bit binary pattern 00010110.

In practice, 0x16 is commonly seen in code, data dumps, and low-level data manipulation. It represents a byte value and is often used in bitwise operations, flags, and memory addresses where precise byte values are important. When shown as a byte, 0x16 equals 00010110 in binary and 22 in decimal.

In ASCII, the byte value 0x16 is a control character known as SYN (synchronous idle), a non-printable character used in some serial communications and protocols rather than in ordinary text.

An example of cross-context familiarity: the decimal port number 22, used for SSH, is the same value as the hexadecimal 0x16, illustrating how hex literals map to common decimal values.

Hex notation is widely used beyond 0x16: any value can be written with a 0x prefix in many programming languages to express hex numbers. 0x16 serves as a simple illustration of this convention.