What is ERF function in Excel? ERF function is one of Engineering functions in Microsoft Excel that returns the error function integrated between lower_limit and upper_limit. Syntax of ERF function ERF(lower_limit,[upper_limit]) The ERF function syntax has the following arguments: Lower_limit: The lower bound for integrating ERF. Upper_limit(Optional): The upper bound for integrating ERF. If omitted, ERF integrates […]