Header File 

stdio.h  

Category 

Input/output Routines 

Prototype 

int putc(int c, FILE *stream); 

wint_t putwc(wint_t c, FILE *stream); 

Description 

Outputs a character to a stream. 

putc is a macro that outputs the character c to the stream given by stream. 

Return Value 

On success, putc returns the character printed, c.  

On error, putc returns EOF. 

Example  

#include <stdio.h>
int main(void)
{
   char msg[] = "Hello world\n";
   int i = 0;
   while (msg[i])
      putc(msg[i++], stdout);
   return 0;
}

Portability