Use IF or IFERROR to correct a #DIV/0! error in Excel| support.microsoft.com
The IFS function checks whether one or more conditions are met and returns a value that corresponds to the first TRUE condition. IFS will allow you to include up to 127 pairs of conditions (the test if something is True and the result if something is true). IFS can take the place of multiple nested IF statements.| support.microsoft.com
Formulas can sometimes result in error values in addition to returning unintended results. Learn about best practices to avoid those problems.| support.microsoft.com
Lists all Excel functions by their category, such as Logical functions or Text functions.| support.microsoft.com
A complete list of all Excel functions in alphabetical order.| support.microsoft.com
How to use the COUNTIF function in Excel to count the number of cells that meet values you set.| support.microsoft.com