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en:arduino:libraries:filepeek [2016/12/25 22:15] |
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+ | [[en:arduino:libraries:sd|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(). | ||
+ | |||
+ | \\ peek() inherits from the Stream utility class. | ||
+ | ===== 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() | ||
+ | * Stream.peek() | ||
+ | [[en:arduino:libraries|Reference Home]] |