---
title: vDSP_vclr
framework: Kernel
role: symbol
role_heading: Function
platforms: [macOS 10.4+]
path: kernel/1579961-vdsp_vclr
---

# vDSP_vclr

Populates a single-precision vector with zeros.

## Declaration

```occ
void vDSP_vclr(float *__C, vDSP_Stride __IC, vDSP_Length __N);
```

## Parameters

- `__C`: Single-precision real output vector.
- `__IC`: Address stride for C.
- `__N`: The number of elements to process.

## Discussion

Discussion The vDSP_vclr and vDSP_vclrD functions populate a vector with zeros.  The following code shows how to clear the array c, setting the value of each element to zero: let n = vDSP_Length(10) let stride = vDSP_Stride(1)

var c = [Float](repeating: .nan,                 count: Int(n))

vDSP_vclr(&c,           stride,           n)

// Prints "[0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0]" print(c)