Keil Logo


The long type modifier specifies that an int variable uses more-than or the same amount of storage as an int type. It is used as follows:

<[>{signed|unsigned}<]> long <[>int<]> name <[>= value<]>;


name is the name of the variable.
value is the value to assign to the variable.


  • The Cx51 Compiler allocates double the amount of storage for long types (4 bytes) as it does for int types (2 bytes).

Refer to 4-Byte Scalars for information regarding the format of long types.

  Arm logo
Important information

This site uses cookies to store information on your computer. By continuing to use our site, you consent to our cookies.

Change Settings

Privacy Policy Update

Arm’s Privacy Policy has been updated. By continuing to use our site, you consent to Arm’s Privacy Policy. Please review our Privacy Policy to learn more about our collection, use and transfers
of your data.