Long variables are extended size variables for number storage, and store 32 bits (4 bytes), from -2,147,483,648 to 2,147,483,647.
If doing math with integers, at least one of the numbers must be followed by an L, forcing it to be a long. See the Integer Constants page for details.
long var = val;
var: variable name.
val: the value assigned to the variable.
long speedOfLight_km_s = 300000L; // see the Integer Constants page for explanation of the 'L'
- [Language] byte
- [Language] int
- [Language] unsigned int
- [Language] unsigned long
- [Language] Integer Constants
- [Language] Variable Declaration
The text of the 86Duino reference is a modification of the Arduino reference and is licensed under a Creative Commons Attribution-ShareAlike 3.0 License. Code samples in the reference are released into the public domain.