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 values must be of type long, either an integer constant followed by an L or a variable of type long, forcing it to be a long. See the Integer Constants page for details.

Syntax

long var = val;

Parameters

  • var
    : variable name
  • val
    : the value assigned to the variable

Example Code

1long speedOfLight_km_s = 300000L; // see the Integer Constants page for explanation of the 'L'

See also

Suggest changes

The content on docs.arduino.cc is facilitated through a public GitHub repository. If you see anything wrong, you can edit this page here.

License

The Arduino documentation is licensed under the Creative Commons Attribution-Share Alike 4.0 license.