---
title: p1Parameter
framework: corenfc
role: symbol
role_heading: Instance Property
path: corenfc/nfciso7816apdu/p1parameter
---

# p1Parameter

The value of the P1 parameter byte.

## Declaration

```swift
var p1Parameter: UInt8 { get }
```

## See Also

### Get the Parameter Bytes

- [p2Parameter](corenfc/nfciso7816apdu/p2parameter.md)