12.10.21 Numerator of real numbers

Unsafe Operation: $numerator-fixnum fx

This is an identity function: return fx itself.

Unsafe Operation: $numerator-bignum bn

This is an identity function: return bn itself.

Unsafe Operation: $numerator-flonum fl

Return the numerator of fl as flonum. This is an alias for $flnumerator.

Unsafe Operation: $numerator-ratnum rt

Return the numerator of rt: a fixnum or bignum.