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layout: stdlib-reference
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# IComparable\.lessThan

## Description

Returns true if <span class='code'>this</span> is less than <span class='code'><a href="lessthan-4.html#decl-other" class="code_param">other</a></span>.




## Signature 

<pre>
<span class="code_keyword">bool</span> <a href="index.html" class="code_type">IComparable</a>.<a href="lessthan-4.html">lessThan</a>(<a href="index.html" class="code_type">IComparable</a>.<span class="code_keyword">This</span> <a href="lessthan-4.html#decl-other" class="code_param">other</a>);

</pre>

## Parameters

####  <a id="decl-other"></a>other  : [IComparable](index.html)\.This