What is the meaning of the n_max or nrow parameter in the read_csv_arrow function in R?

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The nmax or nrow parameter in the readcsvarrow function in R specifies the maximum number of rows that should be read from the CSV file. This can be useful when working with large datasets, as it allows you to read in only a portion of the data at a time, which can help to reduce memory usage and improve performance. If no value is specified for nmax, all rows in the CSV file will be read by default.