Functions and CALL Routines 
Returns the largest integer that is less than or equal to the
argument, using zero fuzzing.

argument

is a numeric constant, variable, or expression.
Unlike the FLOOR function, the FLOORZ
function uses zero fuzzing. If the argument is within 1E12 of an integer,
the FLOOR function fuzzes the result to be equal to that integer. The FLOORZ
function does not fuzz the result. Therefore, with the FLOORZ function you
might get unexpected results.
The following SAS statements produce these results.
SAS Statements 
Results 
var1=2.1;
a=floorz(var1);
put a;

2

var2=2.4;
b=floorz(var2);
put b;

3

c=floorz(1.6);
put c;

2

var6=(1.1.e13);
d=floorz(11.e13);
put d;

0

e=floorz(763);
put e;

763

f=floorz(223.456);
put f;

224

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