4.5 Integer Constants

AVRASM2 allows underscores (_) to be used as separators for increased readability. Underscores may be located anywhere in the number except as the first character or inside the radix specifier.

Example: 0b1100_1010 and 0b_11_00_10_10_ are both legal, while _0b11001010 and 0_b11001010 are not.