It uses another auto trick: if the leading character is '=', the result is treated as a formula. Thus, you can actually write formulas in your CSV and excel wi

It uses another auto trick: if the leading character is '=', the result is treated as a formula. Thus, you can actually write formulas in your CSV and excel will interpret appropriately: $ cat test.csv =1+1,="1-5" $ open -a Microsoft\ Excel test.csv You should see the value '2' (with content `=1+1`)