puts(3)                    Library Functions Manual                    puts(3)

NAME
       fputc, fputs, putc, putchar, puts - output of characters and strings

LIBRARY
       Standard C library (libc, -lc)

SYNOPSIS
       #include <stdio.h>

       int fputc(int c, FILE *stream);
       int putc(int c, FILE *stream);
       int putchar(int c);

       int fputs(const char *restrict s, FILE *restrict stream);
       int puts(const char *s);

DESCRIPTION
       fputc() writes the character c, cast to an unsigned char, to stream.

       putc() is equivalent to fputc() except that it may be implemented as a
       macro which evaluates stream more than once.

       putchar(c) is equivalent to putc(c, stdout).

       fputs() writes the string s to stream, without its terminating null
       byte ('\0').

       puts() writes the string s and a trailing newline to stdout.

       Calls to the functions described here can be mixed with each other and
       with calls to other output functions from the stdio library for the
       same output stream.

       For nonlocking counterparts, see unlocked_stdio(3).

RETURN VALUE
       fputc(), putc(), and putchar() return the character written as an
       unsigned char cast to an int or EOF on error.

       puts() and fputs() return a nonnegative number on success, or EOF on
       error.

ATTRIBUTES
       For an explanation of the terms used in this section, see
       attributes(7).

       +--------------------------------------------+---------------+---------+
       |Interface                                   | Attribute     | Value   |
       +--------------------------------------------+---------------+---------+
       |fputc (), fputs (), putc (), putchar (),    | Thread safety | MT-Safe |
       |puts ()                                     |               |         |
       +--------------------------------------------+---------------+---------+
STANDARDS
       C11, POSIX.1-2008.

HISTORY
       POSIX.1-2001, C89, C99.

BUGS
       It is not advisable to mix calls to output functions from the stdio
       library with low-level calls to write(2) for the file descriptor
       associated with the same output stream; the results will be undefined
       and very probably not what you want.

SEE ALSO
       write(2), ferror(3), fgets(3), fopen(3), fputwc(3), fputws(3),
       fseek(3), fwrite(3), putwchar(3), scanf(3), unlocked_stdio(3)

Linux man-pages 6.7               2023-10-31                           puts(3)