
floor(+Number, -Result)
-Result is floor(+Number)

   Unifies Result with the greatest integral value that is less or equal than
Number and of the same numeric type as Number.



Arguments
   Number              A number.
   Result              Output: number.

Type
   Arithmetic

Description

   Unifies Result with the greatest integral value that is less or equal than
   Number and of the same numeric type as Number.

   This operation works on all numeric types. The result value is the
   largest integral value that is smaller that Number (rounding down
   towards minus infinity).

   The result type is the same as the argument type.  To convert the
   type to integer, use integer/2.

   This predicate can be used as a function in arithmetic expressions.
   In coroutining mode, if Number is uninstantiated, the call to floor/2
   is delayed until this variable is instantiated.




Modes and Determinism
   floor(+, -) is det

Exceptions
     4 --- Number is not instantiated (non-coroutining mode only).
    24 --- Number is not of a numeric type.

Examples
   
    Result is floor(1.8).		% gives Result = 1.0
    Result is floor(-1.8).		% gives Result = -2.0
    Result is floor(1.0).		% gives Result = 1.0
    Result is floor(-0.0).		% gives Result = -0.0
    Result is floor(5).			% gives Result = 5



See Also
   is / 2, ceiling / 2, round / 2, truncate / 2, integer / 2
