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 |