What is the result of (abs -3-4i)?
Some systems will complain that the argument is not real; some will compute the complex norm; and some will make some other decision, such as return the argument unchanged or take the absolute value of the real part only.
| System | result | remark |
|---|---|---|
| Bigloo | no complexes | |
| Biwa | no complexes | |
| Chez | error | |
| Chibi | -3-4i | leaves unchanged |
| Chicken | error | |
| Cyclone | error | |
| Gambit | error | |
| Gauche | 5.0 | |
| Guile | error | |
| Kawa | 5.0 | |
| LIPS | error | |
| MIT | error | |
| Racket | error | |
| Sagittarius | 5 | keeps exactness |
| STklos | error | |
| Unsyntax | -3-4i | leaves unchanged |
| ABCL | 5.0 | |
| CCL | 5 | keeps exactness |
| Clisp | 5 | keeps exactness |
| ECL | 5.0 | |
| GCL | 5.0 | |
| SBCL | 5.0 |