0b00000000

0b00000000 is a binary literal consisting of eight binary digits all set to zero. The 0b prefix signals base-2 notation in many programming languages, so the sequence 00000000 represents the value zero in binary. As an eight-bit pattern, it corresponds to the unsigned decimal value 0; in typical signed representations such as two's complement, it also represents zero.

In decimal, hex, and ASCII terms, 0b00000000 equals 0x00 and the character NUL in ASCII. In digital electronics, the pattern means all bit lines are low, which is commonly interpreted as false or off in various circuits and logic designs. The width of the literal can vary by language; while this example shows eight bits, a binary literal may be written with different lengths depending on the context.

In software development, 0b00000000 is often used to initialize a byte or to express a no-bits-set condition. It also serves as a zero-valued mask in bitwise operations: ANDing with 0b00000000 yields zero, while ORing with 0b00000000 or XORing with 0b00000000 leaves the other operand unchanged. Because it represents the numeric zero, it is typically interpreted as false in boolean contexts in many languages.

See also: binary numeral system, two's complement, ASCII NUL, bit masking.