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<a id="lessequal"></a>
<div class="titlepage"></div>
<a id="IndexLtEqualColon" class="indexterm"></a>
<a id="IndexLtEqualQuestion" class="indexterm"></a>
<a id="IndexLtEqualExpression" class="indexterm"></a>
<a id="IndexLtEqual" class="indexterm"></a>
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<h2>
<span class="refentrytitle"><=</span>
</h2>
<p><= —
Determines if one value is less than or equal to another.
</p>
</div>
<div class="refsect1">
<a id="idm281472953374616"></a>
<h2>Description</h2>
<p>
Determines if one value is less than or equal to another.
</p>
</div>
<div class="refsect1">
<a id="idm281472953373240"></a>
<h2>Syntax</h2>
<pre class="synopsis">(a <span class="command"><strong><=</strong></span> b <span class="command"><strong>?</strong></span> v1 <span class="command"><strong>:</strong></span> v2)</pre>
<p>
where <span class="emphasis"><em>a</em></span>, <span class="emphasis"><em>b</em></span>, <span class="emphasis"><em>v1</em></span> and <span class="emphasis"><em>v2</em></span> may be expressions, but <span class="emphasis"><em>a</em></span>, <span class="emphasis"><em>b</em></span> not audio-rate.
</p>
</div>
<div class="refsect1">
<a id="idm281472953366792"></a>
<h2>Performance</h2>
<p>
In the above conditional, <span class="emphasis"><em>a</em></span> and <span class="emphasis"><em>b</em></span> are first compared. If the indicated relation is true (<span class="emphasis"><em>a</em></span> less than or equal to <span class="emphasis"><em>b</em></span>), then the conditional expression has the value of <span class="emphasis"><em>v1</em></span>; if the relation is false, the expression has the value of <span class="emphasis"><em>v2</em></span>.
</p>
<p>
NB.: If <span class="emphasis"><em>v1</em></span> or <span class="emphasis"><em>v2</em></span> are expressions, these will be evaluated before the conditional is determined.
</p>
<p>
In terms of binding strength, all conditional operators (i.e. the relational operators (<span class="emphasis"><em><</em></span>, etc.), and <span class="emphasis"><em>?</em></span>, and <span class="emphasis"><em>:</em></span> ) are weaker than the arithmetic and logical operators (<span class="emphasis"><em>+</em></span>, <span class="emphasis"><em>-</em></span>, <span class="emphasis"><em>*</em></span>, <span class="emphasis"><em>/</em></span>, <span class="emphasis"><em>&&</em></span> and <span class="emphasis"><em>||</em></span>).
</p>
<p>
These are <span class="emphasis"><em>operators</em></span> not <span class="emphasis"><em>opcodes</em></span>. Therefore, they can be used within orchestra statements, but do not form complete statements themselves.
</p>
</div>
<div class="refsect1">
<a id="idm281472953355736"></a>
<h2>Examples</h2>
<p>
Here is an example of the <= operator. It uses the file <a class="ulink" href="examples/lessequal.csd" target="_top"><em class="citetitle">lessequal.csd</em></a>.
</p>
<div class="example">
<a id="idm281472953353880"></a>
<p class="title">
<strong>Example 26. Example of the <= operator.</strong>
</p>
<div class="example-contents">
<p>See the sections <a class="link" href="UsingRealTime.html" title="Real-Time Audio"><em class="citetitle">Real-time Audio</em></a> and <a class="link" href="CommandFlags.html" title="Csound command line"><em class="citetitle">Command Line Flags</em></a> for more information on using command line flags.</p>
<div class="refsect1">
<a id="idm281472788954440"></a>
<pre class="programlisting">
<span class="nt"><CsoundSynthesizer></span>
<span class="nt"><CsOptions></span>
<span class="c1">; Select audio/midi flags here according to platform</span>
-odac <span class="c1">;;;realtime audio out</span>
<span class="c1">;-iadc ;;;uncomment -iadc if realtime audio input is needed too</span>
<span class="c1">; For Non-realtime ouput leave only the line below:</span>
<span class="c1">; -o <=.wav -W ;;; for file output any platform</span>
<span class="nt"></CsOptions></span>
<span class="nt"><CsInstruments></span>
<span class="vg">sr</span> <span class="o">=</span> <span class="mi">44100</span>
<span class="vg">ksmps</span> <span class="o">=</span> <span class="mi">32</span>
<span class="vg">nchnls</span> <span class="o">=</span> <span class="mi">2</span>
<span class="vg">0dbfs</span> <span class="o">=</span> <span class="mi">1</span>
<span class="kd">instr</span> <span class="nf">1</span>
k<span class="n">val</span> <span class="nb">randomh</span> <span class="mi">0</span><span class="p">,</span> <span class="mf">1.2</span><span class="p">,</span> <span class="mi">20</span> <span class="c1">;choose between 0 and 1.2</span>
<span class="k">if</span> k<span class="n">val</span> <span class="o">></span><span class="mi">0</span> <span class="o">&&</span> k<span class="n">val</span><span class="o"><=</span><span class="mf">.5</span> <span class="k">then</span> <span class="c1">;3 possible outcomes</span>
k<span class="n">vl</span> <span class="o">=</span> <span class="mi">1</span>
<span class="k">elseif</span> k<span class="n">val</span> <span class="o">></span><span class="mf">.5</span> <span class="o">&&</span> k<span class="n">val</span><span class="o"><=</span><span class="mi">1</span> <span class="k">then</span>
k<span class="n">vl</span> <span class="o">=</span><span class="mi">2</span>
<span class="k">elseif</span> k<span class="n">val</span> <span class="o">></span><span class="mi">1</span> <span class="k">then</span>
k<span class="n">vl</span> <span class="o">=</span><span class="mi">3</span>
<span class="k">endif</span>
<span class="nb">printks</span> <span class="s">"random number = %f, result = %f</span><span class="se">\n</span><span class="s">"</span><span class="p">,</span> <span class="mf">.1</span><span class="p">,</span> k<span class="n">val</span><span class="p">,</span> k<span class="n">vl</span>
a<span class="n">sig</span> <span class="nb">poscil</span> <span class="mf">.7</span><span class="p">,</span> <span class="mi">440</span><span class="o">*</span>k<span class="n">vl</span><span class="p">,</span> <span class="mi">1</span>
<span class="nb">outs</span> a<span class="n">sig</span><span class="p">,</span> a<span class="n">sig</span>
<span class="kd">endin</span>
<span class="nt"></CsInstruments></span>
<span class="nt"><CsScore></span>
<span class="nb">f</span><span class="mi">1</span> <span class="mi">0</span> <span class="mi">16384</span> <span class="mi">10</span> <span class="mi">1</span>
<span class="nb">i</span> <span class="mi">1</span> <span class="mi">0</span> <span class="mi">5</span>
<span class="nb">e</span>
<span class="nt"></CsScore></span>
<span class="nt"></CsoundSynthesizer></span>
</pre>
</div>
</div>
</div>
<p><br class="example-break" />
Its output should include lines like this:
</p>
<pre class="screen">
random number = 1.035781, result = 3.000000
random number = 0.134037, result = 1.000000
random number = 0.130742, result = 1.000000
random number = 1.002550, result = 3.000000
random number = 0.370565, result = 1.000000
random number = 0.655759, result = 2.000000
random number = 0.676154, result = 2.000000
......</pre>
<p>
</p>
</div>
<div class="refsect1">
<a id="idm281472953348488"></a>
<h2>See Also</h2>
<p>
<a class="link" href="equals.html" title="=="><em class="citetitle">==</em></a>,
<a class="link" href="greaterequal.html" title=">="><em class="citetitle">>=</em></a>,
<a class="link" href="greaterthan.html" title=">"><em class="citetitle">></em></a>,
<a class="link" href="lessthan.html" title="<"><em class="citetitle"><</em></a>,
<a class="link" href="notequal.html" title="!="><em class="citetitle">!=</em></a>
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