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SD : File class

## peek()

Read a byte from the file without advancing to the next one. That is, successive calls to peek() will return the same value, as will the next call to read().

#### Syntax

file.peek()

#### Parameters

file: an instance of the File class (returned by SD.open())

#### Returns

The next byte (or character), or -1 if none is available.

#### See Also

- available()
- read()
- write()

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