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<head><title>catch -- catch a thrown exception</title>
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<div><a href="index.html" title="">Macaulay2Doc</a> > <a href="___The_sp__Macaulay2_splanguage.html" title="">The Macaulay2 language</a> > <a href="_catch.html" title="catch a thrown exception">catch</a></div>
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<div><h1>catch -- catch a thrown exception</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>catch c</tt></div>
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<li><div class="single">Outputs:<ul><li><span>the value obtained by evaluating the code <tt>c</tt>, or, if a <a href="_throw.html" title="throw an exception">throw</a> was executed during the evaluation of <tt>c</tt>, the argument given to <a href="_throw.html" title="throw an exception">throw</a>.</span></li>
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<div class="single"><h2>Description</h2>
<div><table class="examples"><tr><td><pre>i1 : catch scan(0..10, i -> if i == 5 then throw 18 else print i)
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o1 = 18</pre>
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<div class="single"><h2>See also</h2>
<ul><li><span><a href="_throw.html" title="throw an exception">throw</a> -- throw an exception</span></li>
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<div class="waystouse"><h2>For the programmer</h2>
<p>The object <a href="_catch.html" title="catch a thrown exception">catch</a> is <span>a <a href="___Keyword.html">keyword</a></span>.</p>
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