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Next: <a href="Types-of-Commands.html#Types-of-Commands" accesskey="n" rel="next">Types of Commands</a>, Previous: <a href="Commands.html#Commands" accesskey="p" rel="prev">Commands</a>, Up: <a href="Language.html#Language" accesskey="u" rel="up">Language</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Function-Index.html#Function-Index" title="Index" rel="index">Index</a>]</p>
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<a name="Syntax-Variants-1"></a>
<h3 class="section">6.3 Syntax Variants</h3>
<a name="index-Batch-syntax"></a>
<a name="index-Interactive-syntax"></a>
<p>There are three variants of command syntax, which vary only in how
they detect the end of one command and the start of the next.
</p>
<p>In <em>interactive mode</em>, which is the default for syntax typed at a
command prompt, a period as the last non-blank character on a line
ends a command. A blank line also ends a command.
</p>
<p>In <em>batch mode</em>, an end-of-line period or a blank line also ends a
command. Additionally, it treats any line that has a non-blank
character in the leftmost column as beginning a new command. Thus, in
batch mode the second and subsequent lines in a command must be
indented.
</p>
<p>Regardless of the syntax mode, a plus sign, minus sign, or period in
the leftmost column of a line is ignored and causes that line to begin
a new command. This is most useful in batch mode, in which the first
line of a new command could not otherwise be indented, but it is
accepted regardless of syntax mode.
</p>
<p>The default mode for reading commands from a file is <em>auto mode</em>.
It is the same as batch mode, except that a line with a non-blank in
the leftmost column only starts a new command if that line begins with
the name of a <small>PSPP</small> command. This correctly interprets most valid <small>PSPP</small>
syntax files regardless of the syntax mode for which they are
intended.
</p>
<p>The <samp>--interactive</samp> (or <samp>-i</samp>) or <samp>--batch</samp> (or
<samp>-b</samp>) options set the syntax mode for files listed on the <small>PSPP</small>
command line. See <a href="Main-Options.html#Main-Options">Main Options</a>, for more details.
</p>
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