root/man/libc/putchar.html

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<title>putchar</title>
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<h2 align=center>putchar</h2>
<h4 align=center>OS/161 Reference Manual</h4>

<h3>Name</h3>
putchar - print character to standard output

<h3>Library</h3>
Standard C Library (libc, -lc)

<h3>Synopsis</h3>
#include &lt;stdio.h&gt;<br>
<br>
int<br>
putchar(int <em>chr</em>);

<h3>Description</h3>

putchar writes its argument to standard output.

<h3>Return Values</h3>
putchar returns <em>chr</em>. On error, EOF is returned, and
<A HREF=../syscall/errno.html>errno</A> is set according to the error
encountered.

<h3>Errors</h3>

Any of the errors from <A HREF=../syscall/write.html>write</A> may
occur.

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