While Loop Tango Server evaluates the expression before executing the contained actions. If the expression evaluates to true then the contained actions are executed. Then, Tango returns to the While Loop action and re-evaluates the expression. If it is true, the contained actions are executed again. This process continues until the expression evaluates to false.
Execution then continues at the next action outside the loop.
If Tango Server finds the expression is invalid, it returns a runtime error. Tango Server evaluates any meta tags in the expression on each pass through the loop. If Start Value is a meta tag, Tango Server evaluates it prior to the first pass through the loop. By fields contain meta tags, Tango Server evaluates them on each pass through the loop. At the end of the loop, execution returns to the top.