---
title: NSDecimalNumber.CalculationError.underflow
framework: foundation
role: symbol
role_heading: Case
path: foundation/nsdecimalnumber/calculationerror/underflow
---

# NSDecimalNumber.CalculationError.underflow

The number is too small to represent.

## Declaration

```swift
case underflow
```

## See Also

### Constants

- [NSDecimalNumber.CalculationError.noError](foundation/nsdecimalnumber/calculationerror/noerror.md)
- [NSDecimalNumber.CalculationError.lossOfPrecision](foundation/nsdecimalnumber/calculationerror/lossofprecision.md)
- [NSDecimalNumber.CalculationError.overflow](foundation/nsdecimalnumber/calculationerror/overflow.md)
- [NSDecimalNumber.CalculationError.divideByZero](foundation/nsdecimalnumber/calculationerror/dividebyzero.md)