# init(style:allowedUnits:spellsOutZero:includesActualByteCount:locale:) Initializes a byte count format style. ``` init(style: Measurement.FormatStyle.ByteCount.Style, allowedUnits: Measurement.FormatStyle.ByteCount.Units, spellsOutZero: Bool, includesActualByteCount: Bool, locale: Locale) ``` ## Parameters `style` The style of byte count to express, such as memory or file system storage. `allowedUnits` The units the format style can use to express the byte count. `spellsOutZero` A Boolean value that indicates whether the format style should spell out zero-byte values as text, like `Zero kB`. `includesActualByteCount` A Boolean value that indicates whether the format style should include the exact byte count, in addition to expressing it in terms of units. For example, `1 kB (1,024 bytes)`. `locale` The locale to use to format the numeric part of the byte count. ## Discussion In situations that infer the [`Measurement.FormatStyle.ByteCount`](/documentation/Foundation/Measurement/FormatStyle/ByteCount) type, you can call `Measurement/FormatStyle/ByteCount/byteCount(style:allowedUnits:spellsOutZero:includesActualByteCount:)` instead of explicitly using this initializer. This is the case when you call [`formatted()`](/documentation/Foundation/Measurement/formatted()) on a [`Measurement`](/documentation/Foundation/Measurement) whose unit type is [`UnitInformationStorage`](/documentation/Foundation/UnitInformationStorage). --- 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)