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 # Interface fortran::syscdoiterationf

 Last update: 17.07.2025 

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**Definition**: `syscSystemCouplingF.fi` (line 640)

Provide an interface to check whether to do a coupling iteration.

## Members

- [syscdoiterationf](interfacefortran_1_1syscdoiterationf.md#interfacefortran_1_1syscdoiterationf_1acc2cd7da0c5cc2a33785425659ba1f4d)

## Public functions

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### Function syscdoiterationf

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```fortran
logical function syscdoiterationf()

```

Provide a function to check whether to do a coupling iteration.

**Returns**:

true if another coupling iteration is required, otherwise it returns false.

**Return type**: logical function