---
title: "vexpm1f(_:)"
framework: accelerate
role: symbol
role_heading: Function
path: "accelerate/vexpm1f(_:)"
---

# vexpm1f(_:)

For each vector element, calculates ExpM1(x) = Exp(x) - 1.  But, for small enough arguments, ExpM1(x) is expected to be more accurate than Exp(x) - 1.

## Declaration

```swift
func vexpm1f(_: vFloat) -> vFloat
```

## See Also

### Exponential and Logarithmic Functions (from vfp.h)

- [vexpf(_:)](accelerate/vexpf(_:).md)
- [vexp2f(_:)](accelerate/vexp2f(_:).md)
- [vlogf(_:)](accelerate/vlogf(_:).md)
- [vlog1pf(_:)](accelerate/vlog1pf(_:).md)
- [vlog10f(_:)](accelerate/vlog10f(_:).md)
- [vlogbf(_:)](accelerate/vlogbf(_:).md)
- [vlog2f(_:)](accelerate/vlog2f(_:).md)
- [vvpows(_:_:_:_:)](accelerate/vvpows(_:_:_:_:).md)
- [vvpowsf(_:_:_:_:)](accelerate/vvpowsf(_:_:_:_:).md)
- [vscalbf(_:_:)](accelerate/vscalbf(_:_:).md)