---
title: vDSP_vsadd
framework: Kernel
role: symbol
role_heading: Function
platforms: [macOS 10.4+]
path: kernel/1579993-vdsp_vsadd
---

# vDSP_vsadd

Adds a single-precision scalar value to a single-precision vector.

## Declaration

```occ
void vDSP_vsadd(const float *__A, vDSP_Stride __IA, const float *__B, float *__C, vDSP_Stride __IC, vDSP_Length __N);
```

## Parameters

- `__A`: Single-precision real input vector.
- `__IA`: Stride for A.
- `__B`: Pointer to single-precision real input scalar.
- `__C`: Single-precision real output vector.
- `__IC`: Stride for C.
- `__N`: The number of elements to process.

## Discussion

Discussion This function calculates the sums of the first N elements of A and the scalar value B, writing the result to C:

The operation is:  for (n = 0; n < N; ++n)     C[n] = A[n] + B[0]; The following code shows an example of using vDSP_vsadd: let a: [Float] = [1, 2, 4, 5] var b: Float = 2

let n = vDSP_Length(a.count)

var c = [Float](repeating: 0,                 count: a.count)

vDSP_vsadd(a, stride,            &b,            &c, stride,            n)

// Prints "[3.0, 4.0, 6.0, 7.0]" print(c)