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<head><title>isReal -- whether a number is real</title>
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<div><h1>isReal -- whether a number is real</h1>
<div class="single"><h2>Synopsis</h2>
<ul><li><div class="list"><dl class="element"><dt class="heading">Usage: </dt><dd class="value"><div><tt>isReal x</tt></div>
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<li><div class="single">Inputs:<ul><li><span><tt>x</tt>, <span>a <a href="___Number.html">number</a></span></span></li>
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<li><div class="single">Outputs:<ul><li><span><span>a <a href="___Boolean.html">Boolean value</a></span>, whether <tt>x</tt> is real</span></li>
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<div class="single"><h2>Description</h2>
<div><table class="examples"><tr><td><pre>i1 : isReal 2.
o1 = true</pre>
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<tr><td><pre>i2 : isReal sqrt(-1)
o2 = false</pre>
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<div class="waystouse"><h2>Ways to use <tt>isReal</tt> :</h2>
<ul><li>isReal(CC)</li>
<li>isReal(QQ)</li>
<li>isReal(RR)</li>
<li>isReal(ZZ)</li>
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