---
title: NDArray.ScalarType.float8e4m3fn
framework: coreai
role: symbol
role_heading: Case
path: coreai/ndarray/scalartype-swift.enum/float8e4m3fn
---

# NDArray.ScalarType.float8e4m3fn

An 8-bit floating-point type with 4 exponent bits and 3 mantissa bits, without a sign bit.

## Declaration

```swift
case float8e4m3fn
```

## Discussion

Discussion FP8 E4M3FN (Finite Number) format emphasizes precision over range with additional mantissa bits. This type is used for quantization and in some activation functions.

## See Also

### Defining 8-bit floating-point types

- [NDArray.ScalarType.float8e5m2](coreai/ndarray/scalartype-swift.enum/float8e5m2.md)