C Language and Libraries Help (clang.hlp) (Table of Contents; Topic list)
fprintf
 Summary Example                         Up Contents Index Back
─────Run-Time Library───────────────────────────────────────────────────────
 
     The fprintf function formats and prints a series of characters and
     values to the output stream. Each <argument> (if any) is converted
     and output according to the corresponding format specification in
     <format>.
 
     The <format> argument is of the same form and function as the
     <format> argument for the printf function.
     See: Format Specifiers
          Escape Sequences
 
     Return Value
 
     The fprintf function returns the number of characters printed, or
     a negative value in the case of an output error.
                                    -♦-