---
title: "maximumLengthOfBytes(using:)"
framework: swift
role: symbol
role_heading: Instance Method
path: "swift/stringprotocol/maximumlengthofbytes(using:)"
---

# maximumLengthOfBytes(using:)

Returns the maximum number of bytes needed to store the String in a given encoding.

## Declaration

```swift
func maximumLengthOfBytes(using encoding: String.Encoding) -> Int
```