Structured control actions

Structured control action usages are used to control the performance of nested action usages in a structured way. There are three kinds of structured control action usages:

• An if action usage evaluates a condition expression and then performs a then clause action usage if the expression evaluates to true, or, optionally, an else clause action usage if the expression evaluates to false.
  • See the If action page.
• A while loop action usage performs a body clause action usage iteratively, as long as its while expression continues to evaluate to true and its until expression continues to evaluate to false.
  • See the While and for loop actions page.
• A for loop action usage performs a body clause action usage iteratively, assigning a loop variable successively for each iteration to the values resulting from the evaluation of a sequence expression.
  • See the While and for loop actions page.