---
title: "init(in1:in1_type:in2:in2_type:in3:in3_type:out:out_type:)"
framework: accelerate
role: symbol
role_heading: Initializer
path: "accelerate/bnnsarithmeticternary/init(in1:in1_type:in2:in2_type:in3:in3_type:out:out_type:)"
---

# init(in1:in1_type:in2:in2_type:in3:in3_type:out:out_type:)

Returns a new arithmetic structure that takes three inputs from the specified parameters.

## Declaration

```swift
init(in1: BNNSNDArrayDescriptor, in1_type: BNNSDescriptorType, in2: BNNSNDArrayDescriptor, in2_type: BNNSDescriptorType, in3: BNNSNDArrayDescriptor, in3_type: BNNSDescriptorType, out: BNNSNDArrayDescriptor, out_type: BNNSDescriptorType)
```

## Parameters

- `in1`: The descriptor of the first input.
- `in1_type`: The descriptor type of the first input.
- `in2`: The descriptor of the second input.
- `in2_type`: The descriptor type of the second input.
- `in3`: The descriptor of the third input.
- `in3_type`: The descriptor type of the third input.
- `out`: The descriptor of the output.
- `out_type`: The descriptor type of the output.

## See Also

### Creating an Arithmetic Structure

- [init()](accelerate/bnnsarithmeticternary/init().md)