Integer constants can be written as binary constants, consisting of a sequence of ‘ 0 ’ and ‘ 1 ’ digits, prefixed by ‘ 0b ’ or ‘ 0B ’. This is particularly useful in environments that operate a lot on the bit level (like microcontrollers).
The following statements are identical:
i = 42; i = 0x2a; i = 052; i = 0b101010;
The type of these constants follows the same rules as for octal or hexadecimal integer constants, so suffixes like ‘ L ’ or ‘ UL ’ can be applied.