Those of us over a certain age will remember using paper lookup tables for logarithms or trigonometry functions. Those who are younger will have been exposed to lookup tables in their programming ...

If you’re working on your accounts and you need to convert all your overseas expenses into the currency you file your tax returns in, you need to know the exchange rate for the date of every expense.

VLOOKUP and Search are two functions that Excel uses to search for text. VLOOKUP finds data in a column and returns the contents of an adjacent cell. Search finds data in a cell and returns the string ...