12.10.51 Truncate rounding

Unsafe Operation: $truncate-fixnum FX

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

Unsafe Operation: $truncate-bignum BN

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

Unsafe Operation: $truncate-flonum FL

Rounding as defined by truncate. Return a flonum.

Unsafe Operation: $truncate-ratnum RN

Rounding as defined by truncate. Return an exact integer.