BIT

BIT is a bit-string data type attribute that identifies a variable as a bit-string variable. Its format is:

BIT[(n)]

Length n is an extent expression or integer constant, depending on the storage class of the declared name. The length n must be a non-negative integer constant or an expression that evaluates to a non-negative integer. A default length of 1 is supplied if no length is given.

For more information on BIT, see the chapter Storage Classes and the section Bit-String Data in the chapter Data Types.