Lahey/GNU Fortran

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6.60 Binary constants using the `0b' prefix

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.