[BASH] Get person's age based from date of birth from .csv file

Hey guys, I've been lurking here for the past few days and have been helped massively by the posts here. So, firstly, a huge thank you for that. However, I'm stuck on a particular problem and require some 1 -to-1 assistance. I have a file called details.csv which holds 3 basic details about a person: their age, phone number and date of birth (in dd/mm/yyyy format). These details are entered via the standard input: read -p "Name: " name read -p "Number: " number etc and then placed in the details.csv. details.csv in then sorted into date-of-birth order. So, say I have the following information in the csv file. fred,999,03/04/2005 jane,888,01/01/1993 james,3456,12/01/1987 john,1234,11/08/1955 How can I get and display the age of all four people based on today's date? Thank you for your time.

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