Problem description & analysis:

Here below is the student data table:

Task: Now we want to create student IDs for every student. The student ID should be class number + student’s serial number in the class, and the serial number should be two-digit (to calculate in cell C1).

Solution:

Use SPL XLL and the code is as follows:

=spl("=E(?1).group(Class).(~.(Class+string(#,""00""))).conj().new(~:ID)",A1:B21)

The results are shown below:

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✨Plugin Installation Method: SPL XLL Installation and Configuration

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