SharePoint 2013 Workflow missing in sharepoint 2013 Designer

There are three platform type and only one are available when you install sharepoint 2013. The other two require additional installation as well as setup.

1. SharePoint 2010 Workflow [This is the only available option when you use sharepoint designer when you install sharepoint 2013. This is basiclly same functionally with 2010]
2. SharePoint 2013 Workflow
3. SharePoint 2013 Workflow – Project Server

To Install SharePoint 2013 Workflow, follow this guide workflow manager. It basiclly install and configure Workflow Manager.

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