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Chapters:
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&nbsp;&nbsp;<a href="Introduction.html">1: Introduction</a><br>
&nbsp;&nbsp;<a href="SimpleExample.html">2: Simple example</a><br>
&nbsp;&nbsp;<a href="InvokingGri.html">3: Invocation</a><br>
&nbsp;&nbsp;<a href="GettingMoreControl.html">4: Finer Control</a><br>
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&nbsp;&nbsp;<a href="Commands.html">9: Gri Commands</a><br>
&nbsp;&nbsp;<a href="Programming.html">10: Programming</a><br>
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Indices:<br>
&nbsp;&nbsp;<a href="ConceptIndex.html"><i>Concepts</i></a><br>
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<h3>9.3.47: `<font color="#82140F"><code>sprintf</code></font>'</h3>

<!-- latex: \index{sprintf} -->

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<PRE>
<font color="#82140F">
`sprintf \synonym "format" .variable. [.variable. [...]]'
</font></PRE>
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<p>

Write numbers into a synonym (text string).  This is useful for
labelling plots.
<p>

`<font color="#82140F"><code>sprintf \out "a = %lf b = %.2f" .a. .b.</code></font>' - Create a synonym
called `<font color="#82140F"><code>\out</code></font>', and print the values of the variables `<font color="#82140F"><code>.a.</code></font>' and
`<font color="#82140F"><code>.b.</code></font>' into it.  If `<font color="#82140F"><code>.a.</code></font>' = 1 and `<font color="#82140F"><code>.b.</code></font>' = 0.112, then
`<font color="#82140F"><code>\out</code></font>' will be `<font color="#82140F"><code>"a = 1 b = 0.11"</code></font>'
<p>
Formatting codes are as in the C programming language, eg:
<p>
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<font color="#82140F">
%.2f  -- Use floating point with 2 decimal places.
%9.2f -- As above, but number takes 9 characters.
%e    -- Use exponential notation.
</font></PRE>
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<p>

<b>CAUTION</b>: Variables are stored in the <b>floating point</b> in
Gri, so you must use a format like `<font color="#82140F"><code>"%f"</code></font>',
<b>not</b> an integer code like `<font color="#82140F"><code>"%d"</code></font>'.
If you want an integer, use `<font color="#82140F"><code>"%.0f"</code></font>'.
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