Calculate the next smallest floating point value before x.
Return the greatest number less than x that is representable as a real; thus, it gives the previous point on the IEEE number line.
assert( nextDown(1.0 + real.epsilon) == 1.0);
See Implementation
Calculate the next smallest floating point value before x.
Return the greatest number less than x that is representable as a real; thus, it gives the previous point on the IEEE number line.