Which iterator to use for what task?

Task	Iterator for the task
Run a workflow a specific number of times, from a starting number to an ending number.	For
Run a model until a particular variable or condition is True or False.	While
Repeat a process for each feature in a feature class (iterate a selection through all features with shared attributes).	Iterate Feature Selection
Repeat a process for each record in a table (iterate a selection through all records with shared attributes).	Iterate Row Selection
Repeat a process for each value in a field.	Iterate Field Values
Repeat a process for each value in a list of input values.	Iterate Multivalue
Repeat a process with each dataset in a workspace.	Iterate Datasets
Repeat a process with each feature class in a workspace.	Iterate Feature Classes
Repeat a process with each file in a folder.	Iterate Files
Repeat a process with each raster in a workspace.	Iterate Rasters
Repeat a process with each table in a workspace.	Iterate Tables
Repeat a process with each workspace in a folder.	Iterate Workspaces