12.10.52 Round rounding

Unsafe Operation: $round-fixnum FX

Rounding as defined by round. This is an identity function, returning N itself.

Unsafe Operation: $round-bignum BN

Rounding as defined by round. This is an identity function, returning N itself.

Unsafe Operation: $round-flonum FL

Rounding as defined by round. Return a flonum.

Unsafe Operation: $round-ratnum RN

Rounding as defined by round. Return an exact integer.