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<H1 class="no-header">curs_deleteln 3x 2025-07-05 ncurses 6.6 Library calls</H1>
<PRE>
<STRONG><A HREF="curs_deleteln.3x.html">curs_deleteln(3x)</A></STRONG> Library calls <STRONG><A HREF="curs_deleteln.3x.html">curs_deleteln(3x)</A></STRONG>
</PRE><H2><a name="h2-NAME">NAME</a></H2><PRE>
<STRONG>deleteln</STRONG>, <STRONG>wdeleteln</STRONG>, <STRONG>insertln</STRONG>, <STRONG>winsertln</STRONG>, <STRONG>insdelln</STRONG>, <STRONG>winsdelln</STRONG> - delete
or insert lines in a <EM>curses</EM> window
</PRE><H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE>
<STRONG>#include</STRONG> <STRONG><curses.h></STRONG>
<STRONG>int</STRONG> <STRONG>deleteln(void);</STRONG>
<STRONG>int</STRONG> <STRONG>wdeleteln(WINDOW</STRONG> <STRONG>*</STRONG> <EM>win</EM><STRONG>);</STRONG>
<STRONG>int</STRONG> <STRONG>insertln(void);</STRONG>
<STRONG>int</STRONG> <STRONG>winsertln(WINDOW</STRONG> <STRONG>*</STRONG> <EM>win</EM><STRONG>);</STRONG>
<STRONG>int</STRONG> <STRONG>insdelln(int</STRONG> <EM>n</EM><STRONG>);</STRONG>
<STRONG>int</STRONG> <STRONG>winsdelln(WINDOW</STRONG> <STRONG>*</STRONG> <EM>win</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>n</EM><STRONG>);</STRONG>
</PRE><H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
<STRONG>wdeleteln</STRONG> deletes the line at the cursor in <EM>win</EM>; all lines below it
move up one line. <EM>curses</EM> then fills the bottom line of <EM>win</EM> with the
background character configured by <STRONG><A HREF="curs_bkgd.3x.html">wbkgdset(3x)</A></STRONG> (wide-character API
users: <STRONG><A HREF="curs_bkgrnd.3x.html">wbkgrndset(3x)</A></STRONG>). The cursor position does not change.
<STRONG>winsertln</STRONG> inserts a new, empty line of characters above the line at the
cursor in <EM>win</EM>, shifting the existing lines down by one. The content of
the window's bottom line is lost; <EM>curses</EM> fills the new line with the
background character. The cursor position does not change.
<STRONG>winsdelln</STRONG> inserts or deletes <EM>n</EM> lines in <EM>win</EM> as <EM>n</EM> is positive or
negative, respectively, as if by repeatedly calling <STRONG>winsertln</STRONG> or
<STRONG>wdeleteln</STRONG>. <STRONG>winsdelln(</STRONG>...<STRONG>,</STRONG> <STRONG>0)</STRONG> performs no operation.
</PRE><H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE>
These functions return <STRONG>OK</STRONG> on success and <STRONG>ERR</STRONG> on failure.
In <EM>ncurses</EM>, they fail if <EM>win</EM> is <EM>NULL</EM>.
</PRE><H2><a name="h2-NOTES">NOTES</a></H2><PRE>
All of these functions except <STRONG>winsdelln</STRONG> may be implemented as macros.
These functions do not require the terminal to possess hardware line
deletion or insertion capabilities. Even if available, by default
<EM>curses</EM> does not use them; see <STRONG><A HREF="idlok.3x.html">idlok(3x)</A></STRONG>.
</PRE><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
X/Open Curses Issue 4 describes these functions. It specifies no error
conditions for them.
SVr4 describes a successful return value only as "an integer value
other than <EM>ERR</EM>".
</PRE><H2><a name="h2-HISTORY">HISTORY</a></H2><PRE>
4BSD (1980) introduced <EM>deleteln</EM>, <EM>wdeleteln</EM>, <EM>insertln</EM>, and <EM>winsertln</EM>.
SVr3.1 (1987) added <EM>insdelln</EM> and <EM>winsdelln</EM>.
</PRE><H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
<STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>
ncurses 6.6 2025-07-05 <STRONG><A HREF="curs_deleteln.3x.html">curs_deleteln(3x)</A></STRONG>
</PRE>
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<li><a href="#h2-NAME">NAME</a></li>
<li><a href="#h2-SYNOPSIS">SYNOPSIS</a></li>
<li><a href="#h2-DESCRIPTION">DESCRIPTION</a></li>
<li><a href="#h2-RETURN-VALUE">RETURN VALUE</a></li>
<li><a href="#h2-NOTES">NOTES</a></li>
<li><a href="#h2-PORTABILITY">PORTABILITY</a></li>
<li><a href="#h2-HISTORY">HISTORY</a></li>
<li><a href="#h2-SEE-ALSO">SEE ALSO</a></li>
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