Count cells with error values

In this module:

The sample data set is the range B5:E8 shown in figure 1. The formulas in column B, rows 13 to 32 are displayed in column C. For details of the double negation operator used in cell B10 (=SUMPRODUCT(--ISERROR(ErrData))) see entering-and-editing-worksheet-data

Fig 1: Excel Online #1 - counting cells with error values. A demonstration of four types.