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printf Format String

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The format string, present in each of the printf function calls, controls how each function will convert, format, and print its arguments.

Note: There must be enough arguments for the format; if not, the results will be unpredictable and possibly disastrous. Excess arguments (more than required by the format) are ignored.

The format string is a character string that contains two types of objects:

  • Plain characters are copied verbatim to the output stream.
  • Conversion specifications fetch arguments from the argument list and apply formatting to them.


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