unsigned long — Maple v0.0.9 Documentation

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# `unsigned long`

An unsigned version of the long data type. An `unsigned long` occupies 8 bytes of memory; it stores an integer from 0 to 2^64-1, which is approximately 1.8×10^19 (18 quintillion, or 18 billion billion).

Like an unsigned int, an `unsigned long` won’t store negative numbers; it is also subject to the same overflow issues as any integral data type.

Here is an example of declaring an `unsigned long` variable named `c`, then giving it value 299,792,458,000,000,000 (see integer constants for an explanation of the “L” at the end of the number):

    // Speed of light in nanometers per second (approximate).
    unsigned long c = 299792458000000000L;

The general syntax for declaring an `unsigned long` variable named `var`, then giving it value `val`, looks like:

    unsigned long var = val;

## See Also

- long
- int
- unsigned
- char
- unsigned char
- Integer Constants
- Variables

License and Attribution

This documentation page was adapted from the Arduino Reference Documentation, which is released under a Creative Commons Attribution-ShareAlike 3.0 License.

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