What this calculator does
Add a list of whole integers exactly and show a running total.
How it works
The calculator evaluates sum = a₁ + a₂ + ··· + aₙ using integer arithmetic. Inputs are checked before calculation, and invalid values such as zero denominators or out-of-range selections produce a clear error instead of a misleading result.
Input query strings and outputs
Use an input name in this page’s URL as ?name=value, and join additional inputs with &. Portable shared links may instead use the compact ?ac= state parameter.
Input query strings
1-
?numbers=Integers to addText · Required · Default: 123456789012345, 987654321098765, -111111111111111
Outputs
2-
sumExact sumText · Primary output
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countNumber of addendsWhole number
Inputs and results
The inputs are Integers to add. Results include Exact sum, Number of addends.