---
title: one
framework: foundation
role: symbol
role_heading: Type Property
path: foundation/nsdecimalnumber/one
---

# one

A decimal number equivalent to the number 1.0.

## Declaration

```swift
@NSCopying class var one: NSDecimalNumber { get }
```

## Return Value

Return Value An NSDecimalNumber object equivalent to the number 1.0.

## See Also

### Creating a Decimal Number

- [zero](foundation/nsdecimalnumber/zero.md)
- [notANumber](foundation/nsdecimalnumber/notanumber.md)