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#include <stdio.h>

int puts (
  const char *string);   /* string to output */

The puts function writes string followed by a newline character ('\n') to the output stream using the putchar function.


  • This function is implementation-specific and is based on the operation of the putchar function. This function, as provided in the standard library, writes characters using the microcontroller's serial port. Custom functions may use other I/O devices.
Return Value

The puts function returns EOF if an error occurred and a value of 0 if no errors were encountered.

See Also


#include <stdio.h>

void tst_puts (void) {
  puts ("Line #1");
  puts ("Line #2");
  puts ("Line #3");
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