---
title: "expm1(_:)"
framework: simd
role: symbol
role_heading: Function
path: "simd/expm1(_:)-4osfq"
---

# expm1(_:)

Returns eˣ-1 for each element in a vector.

## Declaration

```swift
func expm1(_ x: simd_double4) -> simd_double4
```

## See Also

### Exponential and Logarithmic Functions

- [exp(_:)](simd/exp(_:)-92zj.md)
- [exp2(_:)](simd/exp2(_:)-6nz50.md)
- [exp10(_:)](simd/exp10(_:)-apfo.md)
- [log(_:)](simd/log(_:)-54908.md)
- [log2(_:)](simd/log2(_:)-2m5uu.md)
- [log10(_:)](simd/log10(_:)-80x29.md)
- [log1p(_:)](simd/log1p(_:)-t4r0.md)