# Vector clear and fill functions Populate vectors with zeros or a scalar value. ## Topics ### Clearing Vectors [`static func clear(inout V)`](/documentation/Accelerate/vDSP/clear(_:)-1t76j) Populates a double-precision vector with zeros. [`static func clear(inout V)`](/documentation/Accelerate/vDSP/clear(_:)-5f0gr) Populates a single-precision vector with zeros. [`extern void vDSP_vclr(float *__C, vDSP_Stride __IC, vDSP_Length __N);`](/documentation/Accelerate/vDSP_vclr) Populates a single-precision vector with zeros. [`extern void vDSP_vclrD(double *__C, vDSP_Stride __IC, vDSP_Length __N);`](/documentation/Accelerate/vDSP_vclrD) Populates a double-precision vector with zeros. ### Filling Vectors with a Single Scalar Value [`static func fill(inout V, with: Double)`](/documentation/Accelerate/vDSP/fill(_:with:)-91ud3) Populates a double-precision vector with a specified scalar value. [`static func fill(inout V, with: Float)`](/documentation/Accelerate/vDSP/fill(_:with:)-7gfq3) Populates a single-precision vector with a specified scalar value. [`extern void vDSP_vfill(const float *__A, float *__C, vDSP_Stride __IC, vDSP_Length __N);`](/documentation/Accelerate/vDSP_vfill) Populates a single-precision vector with a specified scalar value. [`extern void vDSP_vfillD(const double *__A, double *__C, vDSP_Stride __IC, vDSP_Length __N);`](/documentation/Accelerate/vDSP_vfillD) Populates a double-precision vector with a specified scalar value. [`extern void vDSP_vfilli(const int *__A, int *__C, vDSP_Stride __IC, vDSP_Length __N);`](/documentation/Accelerate/vDSP_vfilli) Populates an integer vector with a specified scalar value. [`extern void vDSP_zvfill(const DSPSplitComplex *__A, const DSPSplitComplex *__C, vDSP_Stride __IC, vDSP_Length __N);`](/documentation/Accelerate/vDSP_zvfill) Populates a complex single-precision vector with a specified scalar value. [`extern void vDSP_zvfillD(const DSPDoubleSplitComplex *__A, const DSPDoubleSplitComplex *__C, vDSP_Stride __IC, vDSP_Length __N);`](/documentation/Accelerate/vDSP_zvfillD) Populates a complex double-precision vector with a specified scalar value. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)