<p><b><em>array</em></b> is the range from which to extract unique values.</p>
<p><b><em>by_col</em></b>is the optional TRUE or FALSE value indicating the method of comparison: TRUE for columns and FALSE for rows.</p>
<p><b><em>exactly_once</em></b> is the optional TRUE or FALSE value indicating the returning method: TRUE for values occurring once and FALSE for all unique values.</p>
<p>To apply the <b>UNIQUE</b> function,</p>
<ol>
<li>select the cell where you wish to display the result,</li>
<li>
click the <b>Insert function</b><imgalt="Insert function icon"src="../images/insertfunction.png"/> icon situated at the top toolbar,
<br/>or right-click within a selected cell and select the <b>Insert Function</b> option from the menu,
<br/>or click the <imgalt="Function icon"src="../images/function.png"/> icon situated at the formula bar,
<pclass="note">To return a range of values, select a required range of cells, enter the formula, and press the <b>Ctrl+Shift+Enter</b> key combination.</p>