Changing a row of a datatable iwth a given condition

[PrankurJoshi]

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How to change value of existing row and column in a data table

change the value of existing row belonginging to a particular column .and not adding data row.but changing existing value of a datatable

How to update specific row in data table

Hi guys, I have a table with phone numbers as phone_table={911111111111,2222222222,913333333333,914444444444,5555555555}. now i have to add 91 before the 10 digit phone numbers… and i have to update the phone_table. The output should be like phone_table = {911111111111, 912222222222, 913333333333, 914444444444, 915555555555}. Please guys help me if you know