0x11

0x11 is a hexadecimal numeral that denotes the value 17 in decimal. The prefix 0x is used in many programming languages to indicate that the following digits are in base-16. In binary, 0x11 corresponds to 00010001. This compact representation makes 0x11 a common byte value and a convenient form for specifying bit patterns, memory addresses, or protocol flags in low-level code.

In programming, 0x11 often appears as a constant. Languages such as C, C++, JavaScript, Python, and Java accept hexadecimal literals like 0x11, and they are frequently used when dealing with bitwise operations, hardware registers, or color components (for example, in contexts where 0x11 represents a small integer value).

In ASCII and related character sets, the byte 0x11 is the control character DC1 (Device Control 1). DC1 has historical significance in terminal and serial communications and is sometimes associated with flow control mechanisms such as XON in certain interfaces, though its use varies across systems.

Because 0x11 is simply the hexadecimal form of the decimal number 17, it does not imply a specific meaning by itself beyond its numeric value. Its relevance arises in contexts where hexadecimal notation clarifies alignment, masking, or addressing. For example, a programmer might set a flag with a value of 0x11 or check if certain bits are set using a mask that includes 0x11.

See also: hexadecimal notation; 0x prefix; binary and bitwise operations; ASCII control characters; DC1.