# Long Addition Calculator

> Add a list of whole integers exactly and show a running total.

Page: https://askcalculators.com/calculator/long-addition-calculator/
Definition: https://askcalculators.com/calculator/long-addition-calculator/definition.json
JSON Schema: https://askcalculators.com/calculator/long-addition-calculator/schema.json
Version: 1.0.0
Maintained by: AskCalculators (software project; not a credentialed reviewer)
Qualified review: pending. Automated checks do not establish professional approval.
Page status: Live
Review status: Pending

## Use
Open the calculator page and enter values. Query-string parameters can restore and bookmark a calculation.
Example: https://askcalculators.com/calculator/long-addition-calculator/?numbers=123456789012345%2C+987654321098765%2C+-111111111111111

## Inputs
- numbers: Integers to add; type=text; required; default=123456789012345, 987654321098765, -111111111111111

## Outputs
- sum: Exact sum; format=text; primary
- count: Number of addends; format=integer

## Formula
sum = a₁ + a₂ + ··· + aₙ using integer arithmetic

## Rules
- Empty optional inputs are undefined, not zero.
- Hidden conditional inputs are ignored.
- Do not invent missing required inputs.