## Nebu is a spreadsheet editor.

Nebu is a graphical spreadsheet editor for the Varvara system, designed to read and write csv files.

Math operations between cells are done by specifying a range of cells. Cells are always in the **XYY** format, meaning that the x-axis letter is immediately followed by the zero-padded numeric value of the y-axis.

`a05;` | single reference |

`a05:c07` | rectangular reference |

A range uses the colon character between two cell values, operations are made by specifying a range, followed by an operator. For example, to get the product of the 6 cells between a06 and c07:

a06:c07*

If an operation is not specified, it will default to returning the sum.

### Operations

Arithmetic | Logic | ||
---|---|---|---|

`+` | sum(default) | `?` | equal |

`-` | difference | `!` | not-equal |

`*` | product | `>` | greater |

`/` | quotient | `<` | lesser |