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Serial.parseFloat() returns the first valid floating point number from the Serial buffer. parseFloat() is terminated by the first character that is not a floating point number. The function terminates if it times out (see Serial.setTimeout()).

Serial.parseFloat() inherits from the Stream utility class.


Serial.parseFloat(lookahead, ignore)


Serial: serial port object. See the list of available serial ports for each board on the Serial main page.
lookahead: the mode used to look ahead in the stream for a floating point number. Allowed data types: LookaheadMode. Allowed lookahead values:

  • SKIP_ALL: all characters other than a minus sign, decimal point, or digits are ignored when scanning the stream for a floating point number. This is the default mode.

  • SKIP_NONE: Nothing is skipped, and the stream is not touched unless the first waiting character is valid.

  • SKIP_WHITESPACE: Only tabs, spaces, line feeds, and carriage returns are skipped.

ignore: used to skip the indicated char in the search. Used for example to skip thousands divider. Allowed data types: char


Data type: float.

See also