`%`

or `#`

; the respective line is ignored starting at this letter.
Variable names are case-sensitive, not, however, the names of builtin functions.
Long calculations and infinite loops in programs can be interrupted
using the menu-option `Ctrl-c`

.
This does not work, however, with builtin functions.
The following list summarizes how argument data types in the subsequent reference tables are characterized.

Example | Font | Description |

`long` |
typewriter | constant literal text |

name |
slanted | textstring, always quoted (single ' or double '') |

italic | algebraic expression, with or without symbols, scalar, vector, matrix. | |

italic | vector, numeric or symbolic (except Lapack) | |

italic | matrix, numeric or symbolic (except Lapack) | |

italic | symbolic variable | |

COUNT | small capitals | integer, often required. |

2009-03-15