---
title: NDArray.ScalarType.float4e2m1fn
framework: coreai
role: symbol
role_heading: Case
path: coreai/ndarray/scalartype-swift.enum/float4e2m1fn
---

# NDArray.ScalarType.float4e2m1fn

A 4-bit floating-point type with 2 exponent bits and 1 mantissa bit.

## Declaration

```swift
case float4e2m1fn
```

## See Also

### Defining 4- and 8-bit special floating-point types

- [NDArray.ScalarType.float8e8m0fn](coreai/ndarray/scalartype-swift.enum/float8e8m0fn.md)