Returns the first argument if it is not an error value, otherwise returns the second argument if present, or a blank if the second argument is absent.
SYNTAX: =IFERROR(value, [value_if_error])
value - The value to return if 'value' itself is not an error.
value_if_na_error - [optional] - The value that the function returns if 'value' is an error.
PRACTICE SHEET