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# IsMissing Function

Tests if a function is called with an optional parameter.

Skatiet arī: Optional

## Sintakse:

    IsMissing( ArgumentName )

## Parametri:

ArgumentName: the name of an optional argument.

IsMissing returns True if no value has been passed for the ArgumentName; otherwise, it returns False.

Skatiet arī Piemēri.

### Error codes:

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