Function Details : fprintf

intfprintf(FILE * stream,const char * format,... args) ;

Return Type : int

Integer type (typically 4 bytes, -2,147,483,648 to 2,147,483,647)

Read about return values of fprintf function .

1st Parameter Type : FILE *

Pointer to FILE structure for file operations

1st Parameter

Pointer to the file stream where the output will be written

2nd Parameter Type : const char *

Pointer to read-only string

2nd Parameter

A null-terminated string specifying how to format the output

3rd Parameter Type : ...

Represents a variable number of arguments in a function. Used in functions like `printf` or `fprintf` to accept additional parameters beyond those explicitly declared.

3rd Parameter

A variable number of arguments to be formatted according to the `format` string

Read more about parameters of fprintf in parameters section

The fprintffunction in C language Writes formatted output to a stream.

The fprintf function writes output to the stream pointed to by stream, under control of the string pointed to by format that specifies how subsequent arguments are converted for output. It behaves exactly like printf, but writes to the specified stream instead of stdout.

The fprintffunction takes 3 parameters:

•
FILE * `stream`: Pointer to the file stream where the output will be written
•
const char * `format`: A null-terminated string specifying how to format the output
•
... `args`: A variable number of arguments to be formatted according to the `format` string

Writes formatted output to the specified file stream according to the `format` string and additional arguments. Returns the number of characters written, or a negative value if an error occurs.

The fprintf function return value :

Returns the number of characters written if successful, or a negative value if an error occurred

Output

This example demonstrates the basic usage of `fprintf`. It writes formatted output to a file, including an integer and a string.