{{keywords>wiki library source code example reference}}

===== printf =====
<code c>
#include <stdio.h> /* including standard library */
//#include <windows.h> /* uncomment this for Windows */

int printf ( const char * restrict format, ... );
</code>

==== Arguments ====
The function printf prints format to STDOUT\\
    
Code    Description\\
**%c** 	character value\\
**%s** 	string of characters\\
**%d** 	signed integer\\
**%i** 	signed integer\\
**%f** 	floating point value\\
**%e** 	scientific notation, with a lowercase "e"\\
**%E** 	scientific notation, with a uppercase "E"\\
**%g** 	use **%e** or **%f**\\
**%G** 	use **%E** or **%f** \\
**%o** 	octal\\
**%u** 	unsigned integer\\
**%x** 	unsigned hexadecimal, with lowercase letters\\
**%X** 	unsigned hexadecimal, with uppercase letters\\
**%p** 	a pointer\\
**%n** 	the argument shall be a pointer to an integer in which the number of characters written is placed\\
**%%** 	shall be a **%** sign\\

    \n (newline)
    \t (tab)
    \v (vertical tab)
    \f (new page)
    \b (backspace)
    \r (carriage return)
    \n (newline)


===== C Sourcecode Example =====
<code c>
/* 
 * printf example code
 * http://code-reference.com/c/stdio.h/printf 
 */

#include <stdio.h> /* including standard library */
//#include <windows.h> /* uncomment this for Windows */

int main ( void ) {

int number;
number=42;

    printf("the answer to life the universe and everything is %i \n", number);

return 0;
}

</code>

==== output ====

   
   the answer to life the universe and everything is 42