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The purpose of the CaseOf is to allow the value of a variable or expression to control the flow of program execution via a multiway branch. The main reasons for using a CaseOf include improving clarity, by reducing otherwise repetitive coding

• condition - a boolean condition or a number (0 evaluate to false and all other numbers to true). Operators supported: + - * / ( ) OR AND. The tags in the condition are always evaluated before the condition is calculated
• true - The content (html text or template filename) to return if the condition evaluate to true
• false - The content (html text or template filename) to return if the condition evaluate to false

<#if condition="('<#page_title>' = '') and (<#url_PageNumber> > 1)" 
     true="the page title is empty and the page number is greater than 1"
     false="the page title is NOT empty or the page number is NOT greater than 1">