Calculator

A basic calculator for OVOS - "what is 15 times 23", "what is the square root of 144", "what is 20 percent of 150". Fully offline, pure arithmetic, no external dependencies beyond number parsing.

Usage

"what is 5 plus 3"
"what is 15 times 23"
"what is 100 divided by 4"
"what is 20 percent of 150"
"what is 9 squared"
"what is the square root of 144"
"hvad er 5 plus 3"                (Danish)
"hvad er kvadratroden af 144"     (Danish)

Why one intent file per operation

A single intent like "what is {a} {operator} {b}", with the operator word captured as a wildcard, does not work reliably in padatious: with three consecutive wildcards and no literal anchor word between {a}, {operator}, and {b}, the matcher can't tell where one wildcard ends and the next begins. Each operation gets its own intent file instead, with the operator as literal text - the same anchor-word pattern every other intent in this project family uses (e.g. ovos-skill-convert's "convert {value} {from_unit} to {to_unit}").

A rough edge fixed here (not yet back-ported elsewhere)

ovos-skill-convert, ovos-skill-tuning-fork, and ovos-skill-rhythm-box all documented a cosmetic issue: whole-number results spoken with a trailing ".0" (e.g. "10.0" instead of "10"), because Python's default float formatting was used as-is. This skill fixes it with a small _format_number() helper - a whole-number float speaks as a plain integer, a genuine fraction rounds to 4 decimal places. Worth porting the same helper to the other skills later; not done retroactively here to keep this change scoped to a new skill rather than touching several existing ones at once.

Install

pip install ovos-skill-calculator

Development

See DEVELOPMENT.md.

Category

Utility

Tags

#calculator #math #arithmetic