# Calculation Parts

## List of available Calculation Parts

<table><thead><tr><th width="253">Calculation Part</th><th>Details</th></tr></thead><tbody><tr><td><code>Variable Reference</code></td><td>References the value of a <a href="../variables"><strong>Variable</strong></a></td></tr><tr><td><code>Period Reference</code></td><td>References the date value of a <a href="../models/home-tab/creating-a-model/timings"><strong>Period</strong></a> of the Model</td></tr><tr><td><code>Constant</code></td><td>Any numerical value</td></tr><tr><td><code>Text</code></td><td>Any text string</td></tr><tr><td><code>Operator</code></td><td>A mathematical operator: <code>+</code> <code>-</code> <code>*</code> <code>/</code> <code>^</code></td></tr><tr><td><code>Comparator</code></td><td>A comparison operator: <code>&#x3C;</code> <code>></code> <code>&#x3C;=</code> <code>>=</code> <code>=</code></td></tr><tr><td><code>Brackets</code></td><td>Parentheses <code>(</code> <code>)</code> to indicate order of calculation<br><em>or</em><br>Indicate start and end of a Function</td></tr><tr><td><code>Function</code></td><td>Performs a defined <a href="calculation-parts/functions"><strong>Function</strong></a> on a set of arguments</td></tr><tr><td><code>Comma</code></td><td>Separates Function arguments</td></tr><tr><td><code>Lambda Reference</code></td><td>References a <a href="functions/advanced-functions#lambda-functions"><strong>Lambda</strong></a> function</td></tr><tr><td><code>Lambda Argument</code></td><td>Defines an argument for use in <a href="functions/advanced-functions#let-functions"><strong>Let</strong></a> and <a href="functions/advanced-functions#lambda-functions"><strong>Lambda</strong></a> functions</td></tr><tr><td><code>Lambda Argument Reference</code></td><td>References a Lambda Argument</td></tr></tbody></table>

{% hint style="info" %}
Calculations follow standard mathematical order of evaluation: Brackets > Order > Products (Division or Multiplication) > Sums (Addition or Subtraction)
{% endhint %}

The following sections go into detail on some of these Calculation Parts.