SEQUENCE DIAGRAM IF THEN ELSE SOFTWARE

The result may therefore be nondeterministic if more than one test section can be true concurrently. In general, a test section may be executed in any order, including simultaneously if the underlying execution architecture supports it. If no test section yields a true value, then no body section is executed this may be a semantic error if output values are expected from the conditional node. The choice is non-deterministic, unless the test sequence of clauses is specified.If more than one test section yields a true value, only one body section will be executed.The diagram depicts the processes and objects involved and the sequence of messages exchanged as needed to carry out the functionality.

SEQUENCE DIAGRAM IF THEN ELSE SOFTWARE

If one or more test sections yield a true value, one of the corresponding body sections will be executed. In software engineering, a sequence diagram or system sequence diagram (SSD) shows process interactions arranged in a time sequence.

When the conditional node begins execution, the test sections of the clauses are executed. Conditional NodeĪ conditional node is a structured activity node representing an exclusive choice among a number of alternatives.Ī conditional node consists of one or more clauses, each consisting of a test section and a body section. When combined with flows, actions must also satisfy their control and data flow inputs before starting execution. When the sequence node is enabled, its executable nodes are executed in the order specified. Sequence NodeĪ sequence node is a structured activity node that executes its actions in order.

The results of the final execution of the test or body are available after execution of the loop is completed. The setup section is executed once on entry to the loop, and the test and body sections are executed repeatedly until the test produces a false value. The test section may precede or follow the body section.

A loop node is a constructed activity node representing a loop with setup, test, and body sections.Įach section is a well-nested subregion of an activity whose nodes follow any predecessors of the loop and precede any successors of the loop.

Sequence diagram if then else