---
title: FFTDirection
framework: accelerate
role: symbol
role_heading: Type Alias
path: accelerate/fftdirection
---

# FFTDirection

Constants that specify whether to perform a forward or inverse FFT.

## Declaration

```swift
typealias FFTDirection = Int32
```

## See Also

### Constants

- [FFT_FORWARD](accelerate/fft_forward.md)
- [FFT_INVERSE](accelerate/fft_inverse.md)
- [FFT_RADIX2](accelerate/fft_radix2.md)
- [FFT_RADIX3](accelerate/fft_radix3.md)
- [FFT_RADIX5](accelerate/fft_radix5.md)
- [kFFTDirection_Forward](accelerate/kfftdirection_forward.md)
- [kFFTDirection_Inverse](accelerate/kfftdirection_inverse.md)
- [kFFTRadix2](accelerate/kfftradix2.md)
- [kFFTRadix3](accelerate/kfftradix3.md)
- [kFFTRadix5](accelerate/kfftradix5.md)