New to Microsoft Excel? Looking for a tip? How about a tip so mind-blowingly useful as to qualify as a magic trick? You're in luck. In this MS Excel tutorial from ExcelIsFun, the 367th installment in their series of digital spreadsheet magic tricks, you'll see that the IF function sees -1, 1, 10 and -1.23 as TRUE and 0 as FALSE and learn how to use this fact to your advantage when writing formulas.