![Loops, Conditionals, and the Like A common issue with sequence diagrams is how to show looping and conditional behavior. The first thing to point out is that this isn't what sequence diagrams are good at. If you want to show control structures like this, you ... Loops, Conditionals, and the Like A common issue with sequence diagrams is how to show looping and conditional behavior. The first thing to point out is that this isn't what sequence diagrams are good at. If you want to show control structures like this, you ...](http://www.icodeguru.com/design/UML-Distilled/FILES/04fig04.gif)
Loops, Conditionals, and the Like A common issue with sequence diagrams is how to show looping and conditional behavior. The first thing to point out is that this isn't what sequence diagrams are good at. If you want to show control structures like this, you ...
![UML sequence diagram combined fragment is an interaction fragment which defines a combination (expression) of interaction fragments. UML sequence diagram combined fragment is an interaction fragment which defines a combination (expression) of interaction fragments.](https://www.uml-diagrams.org/notation/sequence-loop-infinite.png)
UML sequence diagram combined fragment is an interaction fragment which defines a combination (expression) of interaction fragments.
![Alternate flows in system sequence diagrams - Object-Oriented Analysis and Design for Information Systems Modeling with UML, OCL, and IFML Alternate flows in system sequence diagrams - Object-Oriented Analysis and Design for Information Systems Modeling with UML, OCL, and IFML](https://ebrary.net/htm/img/15/627/83.png)