---
title: exponentSymbol
framework: corefoundation
role: symbol
role_heading: Type Property
path: corefoundation/cfnumberformatterkey/exponentsymbol
---

# exponentSymbol

Specifies the exponent symbol (“E” or “e”) in the scientific notation of numbers (for example, as in 1.0e+56), a CFString object.

## Declaration

```swift
static let exponentSymbol: CFNumberFormatterKey!
```

## See Also

### Constants

- [currencyCode](corefoundation/cfnumberformatterkey/currencycode.md)
- [decimalSeparator](corefoundation/cfnumberformatterkey/decimalseparator.md)
- [currencyDecimalSeparator](corefoundation/cfnumberformatterkey/currencydecimalseparator.md)
- [alwaysShowDecimalSeparator](corefoundation/cfnumberformatterkey/alwaysshowdecimalseparator.md)
- [groupingSeparator](corefoundation/cfnumberformatterkey/groupingseparator.md)
- [useGroupingSeparator](corefoundation/cfnumberformatterkey/usegroupingseparator.md)
- [percentSymbol](corefoundation/cfnumberformatterkey/percentsymbol.md)
- [zeroSymbol](corefoundation/cfnumberformatterkey/zerosymbol.md)
- [naNSymbol](corefoundation/cfnumberformatterkey/nansymbol.md)
- [infinitySymbol](corefoundation/cfnumberformatterkey/infinitysymbol.md)
- [minusSign](corefoundation/cfnumberformatterkey/minussign.md)
- [plusSign](corefoundation/cfnumberformatterkey/plussign.md)
- [currencySymbol](corefoundation/cfnumberformatterkey/currencysymbol.md)
- [minIntegerDigits](corefoundation/cfnumberformatterkey/minintegerdigits.md)
- [maxIntegerDigits](corefoundation/cfnumberformatterkey/maxintegerdigits.md)