<h3>concat() function</h3>
Concatenates several strings to one.

<h4>Syntax</h4>
     concat(<i>string<i>[,<i>string</i>...])

<h4>Arguments</h4>
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<i>  string</i> &rarr; is string.  a string.<br>

<h4>Example</h4>
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     concat('a','b','c','d','e') &rarr; 'abcde'
