**//Rounding functions//**

''ROUND'', ''FLOOR'', ''CEILING'', ''TRUNCATE'' 

LabLISP rounding functions emulate CommonLISP. Each needs one numerical argument. Can have optional second argument (//divisor//), which has to be non-zero. If no optional //divisor// is given, integer 1 is assumed.

Each of these functions returns two values: integer //quotient// and //remainder//.

<code>
 quotient * divisor + remainder = number 
</code>

''ROUND'' rounds number divided by divisor to nearest integer.

<code lisp>
>(round 2.4)
2
0.4
>(round 7.7 2)
4
-0.3
</code>

''FLOOR'' rounds towards nearest lower or equal integer.

''CEILING'' rounds towards nearest higher or equal integer.

''TRUNCATE'' rounds towards zero.