
setbit(+Number, +Index, -Result)

   Result is Number with the Index'th bit set.



Arguments
   Number              Integer.
   Index               Non-negative integer.
   Result              Output: integer.

Type
   Arithmetic

Description
   Set the Index'th bit in Number giving Result. The least significant
   bit has index zero. Two's complement representation is assumed.
   This predicate is used by the ECLiPSe compiler to expand evaluable
   arithmetic expressions.  So the call to setbit(Number, Index, Result) is
   equivalent to

    Result is setbit(Number, Index)

   which should be preferred.

   In coroutining mode, if Number or Index are uninstantiated, the call
   is delayed until these variables are instantiated.


Modes and Determinism
   setbit(+, +, -) is det

Exceptions
     4 --- Number or Index is not instantiated (non-coroutining mode    only).
     5 --- Number or Index is a number but not an integer.
    24 --- Number or Index is not of a numeric type.

Examples
   
    Result is setbit(0, 3).		% gives Result = 8
    Result is setbit(1, 8).		% gives Result = 257
    Result is setbit(setbit(0,3),5).	% gives Result = 40


See Also
   is / 2, clrbit / 3, getbit / 3
