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# long

#### Description

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.

#### Example

        long speedOfLight = 186000L;   // see the Integer Constants page for explanation of the 'L'

#### Syntax

        long var = val;

- var - the long variable name
- val - the value assigned to the variable

#### See Also

- byte
- int
- unsigned int
- unsigned long
- Integer Constants
- Variable Declaration

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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.

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