---
title: byteStart
framework: kernel
role: symbol
role_heading: Instance Property
path: kernel/iostorageextent/1575000-bytestart
---

# byteStart

Starting byte offset for the operation.

## Declaration

```occ
UInt64 byteStart;
```

## See Also

### Fields

- [byteCount](kernel/iostorageextent/1575004-bytecount.md)