What does this filter code means?

Question

IIF(ASCII(A) >= 48 AND ASCII(A) <= 57, TRUE, FALSE)

Does anyone have any idea what does ASCII do here and what does the code try to accomplish? I ran into this filter condition on our informatica and I am not an ETL developer.

Any help will be greatly appreciated.

Answer 1

Well, it checks if A is in interval between 48 and 57 position in ASCII table.

Looks like it's check for numbers. (it's 0 to 9).

Check this out - LINK