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Representation checks are designed to identify inputs containing invalid characters. This is crucial because data integrity relies on having clean and correctly formatted data inputs. Valid inputs should conform to specific patterns or character sets, such as alphanumeric values, which are relevant for the data type being processed.

Identifying invalid characters helps prevent errors that can arise during data processing, such as incorrect data interpretation or system malfunctions. This is particularly important in scenarios where data format is strict and any deviation can lead to systemic failures or inaccurate analysis results. Ensuring that inputs are devoid of invalid characters allows for smoother processing and higher reliability in systems that depend on accurate data input.

While representation checks do help ensure that size restrictions are met and can catch extreme values or mismatched data types indirectly, their primary focus is on the integrity of the characters within the input itself.