All constants are integers.
As in C, the linker considers an integer beginning with 0 to be octal, and an integer beginning with 0x or 0X to be hexadecimal. The linker considers other integers to be decimal.
In addition, you can use the suffixes K and M to scale a
constant by
1024 or 1024*1024
respectively. For example, the following all refer to the same quantity:
_fourk_1 = 4K;
_fourk_2 = 4096;
_fourk_3 = 0x1000;
The text of the Arduino reference is licensed under a Creative Commons Attribution-ShareAlike 3.0 License. Code samples in the reference are released into the public domain.