Introduced by: C++14
Until C++14, standard C++ allowed to define numbers in:
- decimal notation:
int number = 7;
- hexadecimal notation:
int number = 0x7;
- octal notation:
int number = 07;
Anyhow, without special compiler extensions it was not allowed to define numbers in binary format. It changes from C++14. The core language supports binary literals. It’s possible to define integer with
0B prefix to represent binary number.
int number = 0b0111;
It’s worth noticing that the GCC compiler has offered the possibility to define binary numbers since GCC 4.3.
It may be not the most crucial feature of C++ standard, but I believe there are cases when use of binary representation will improve readability of the code.