---
title: begin
description: "获取SVector中起始元素地址。"
url: https://www.hiascend.com/document/detail/zh/canncommercial/latest/API/ascendtb/ascendtb_01_0021.html
sourcePath: /source/zh/canncommercial/900/API/ascendtb/ascendtb_01_0021.html
indexId: 8fbb1699ee3f25358028ef8e3e9aed0e92710cff6e577125aef12b6b57fbe2aa64
---
# begin

#### 功能说明

获取SVector中起始元素地址。


#### 定义

```
T *begin() noexcept
const T *begin() const noexcept
```


#### 返回值说明

| 类型 | 输入/输出 | 说明 |
| --- | --- | --- |
| T \* | 输出 | SVector首部指针。 |