RepeatingElement can be used in FormFunction to repeat a field:

RepeatingElement fields can also be filled programmatically:

In an APIFunction, RepeatingElement specifies that all instances of a particular parameter should be used:

Without RepeatingElement, only the last instance is used:

Interpreter threads over lists, so RepeatingElement is not needed here:

This interprets lists containing a single integer and a repeating list of integers:

RepeatingElement can be used to limit the number of elements:

Use the second argument to limit the number of elements:

Use the second argument to set the initial number of fields to be displayed:

Use the second argument to change the label of the fields:

Use RepeatingElement in conjunction with CompoundElement to interpret complicated structures:

Use it in conjunction with Alternatives to interpret data that can have different shapes:

RepeatingElement should not be confused with DelimitedSequence. RepeatingElement does not permit a single string separated by delimiters:

Use DelimitedSequence for elements separated by delimiters:

Use with CompoundElement in the context of FormFunction to generate a table of fields:

When using the second argument of RepeatingElement with an index in the context of a web form or an API, the "Interpreter" field cannot depend on the index:

This is due to the fact that the "Interpreter" field cannot be delayed: